Charging my Air Conditioner
 

The AC compressor clutch cycles on for about 2 seconds then off for about 3
seconds then repeats. It never blows cold. It worked fine a few days ago, so
this is a sudden onset of symptoms.

I have R134a. I also have a guage that plugs onto the Low Pressure Port. The
sad thing is that I've not used it for a few years and I forgot how.

I have to connect either the guage or the fitting that connects to the can
of stuff, but I can not connect both at the same time. I think I have to
take a pressure reading to make sure it is low. My guage has GRN, BLU, YEL,
and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to 46,
and red is anything above 65, the guage limit is 200.

I need to re-understand the directions.

I _think_ I want the needle to be in the blue area or yellow area, but by no
means in the red or green areas. I have not checked yet, but I suspect it
currently is in the green area. Once I ensure that the pressure is indeed
low, then I can add a can of R134. One can should bring the pressure to
45ish psi.

I _think_ what is happening now is that my pressure is right on the line,
and when the compressor kicks in, the result is pressure drop below the
threshold of the Low Pressure Switch, so the compressor kicks out. This
causes the pressure to rise and satisfy the Low Pressure Switch, so the
compressor kicks on again. The problem repeats from there, and the
compressor clutch kicks on and off due to activity of the Low Pressure
Switch.

I've owned the vehicle for a year, and have done virtually nothing to it. It
has worked perfectly until today, when the AC elected to go offline. I have
no reason to suspect a leak at this time, but if the can of r134 does not do
the trick, then I'll need to take it somewhere for service.

All I can do to the AC system is put the stuff in, and I have to ask to be
sure I have the process right.

Re: Charging my Air Conditioner
 

Hi Jeff,
If you have over filled it in the past, as I have and wasted some
through the pop off valve, then you may have also have ruined the low
pressure switch that sits on the dyer that is bypassed on the cycles you
describe. If so it simply unscrews without losing any pressure. A good rule
of thumb would be 35 psi on low and not over 275 psi on high side:
http://www.redhillsupply.com/blog/20...-question.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"Jeff Strickland" <crwlr@verizon.net> wrote in message
news:1i90i.8227$HR1.3924@trnddc01...
> The AC compressor clutch cycles on for about 2 seconds then off for about
3
> seconds then repeats. It never blows cold. It worked fine a few days ago,
so
> this is a sudden onset of symptoms.
>
> I have R134a. I also have a guage that plugs onto the Low Pressure Port.
The
> sad thing is that I've not used it for a few years and I forgot how.
>
> I have to connect either the guage or the fitting that connects to the can
> of stuff, but I can not connect both at the same time. I think I have to
> take a pressure reading to make sure it is low. My guage has GRN, BLU,
YEL,
> and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
46,
> and red is anything above 65, the guage limit is 200.
>
> I need to re-understand the directions.
>
> I _think_ I want the needle to be in the blue area or yellow area, but by
no
> means in the red or green areas. I have not checked yet, but I suspect it
> currently is in the green area. Once I ensure that the pressure is indeed
> low, then I can add a can of R134. One can should bring the pressure to
> 45ish psi.
>
> I _think_ what is happening now is that my pressure is right on the line,
> and when the compressor kicks in, the result is pressure drop below the
> threshold of the Low Pressure Switch, so the compressor kicks out. This
> causes the pressure to rise and satisfy the Low Pressure Switch, so the
> compressor kicks on again. The problem repeats from there, and the
> compressor clutch kicks on and off due to activity of the Low Pressure
> Switch.
>
> I've owned the vehicle for a year, and have done virtually nothing to it.
It
> has worked perfectly until today, when the AC elected to go offline. I
have
> no reason to suspect a leak at this time, but if the can of r134 does not
do
> the trick, then I'll need to take it somewhere for service.
>
> All I can do to the AC system is put the stuff in, and I have to ask to be
> sure I have the process right.
>
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: Charging my Air Conditioner
 

Hi Jeff,
If you have over filled it in the past, as I have and wasted some
through the pop off valve, then you may have also have ruined the low
pressure switch that sits on the dyer that is bypassed on the cycles you
describe. If so it simply unscrews without losing any pressure. A good rule
of thumb would be 35 psi on low and not over 275 psi on high side:
http://www.redhillsupply.com/blog/20...-question.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"Jeff Strickland" <crwlr@verizon.net> wrote in message
news:1i90i.8227$HR1.3924@trnddc01...
> The AC compressor clutch cycles on for about 2 seconds then off for about
3
> seconds then repeats. It never blows cold. It worked fine a few days ago,
so
> this is a sudden onset of symptoms.
>
> I have R134a. I also have a guage that plugs onto the Low Pressure Port.
The
> sad thing is that I've not used it for a few years and I forgot how.
>
> I have to connect either the guage or the fitting that connects to the can
> of stuff, but I can not connect both at the same time. I think I have to
> take a pressure reading to make sure it is low. My guage has GRN, BLU,
YEL,
> and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
46,
> and red is anything above 65, the guage limit is 200.
>
> I need to re-understand the directions.
>
> I _think_ I want the needle to be in the blue area or yellow area, but by
no
> means in the red or green areas. I have not checked yet, but I suspect it
> currently is in the green area. Once I ensure that the pressure is indeed
> low, then I can add a can of R134. One can should bring the pressure to
> 45ish psi.
>
> I _think_ what is happening now is that my pressure is right on the line,
> and when the compressor kicks in, the result is pressure drop below the
> threshold of the Low Pressure Switch, so the compressor kicks out. This
> causes the pressure to rise and satisfy the Low Pressure Switch, so the
> compressor kicks on again. The problem repeats from there, and the
> compressor clutch kicks on and off due to activity of the Low Pressure
> Switch.
>
> I've owned the vehicle for a year, and have done virtually nothing to it.
It
> has worked perfectly until today, when the AC elected to go offline. I
have
> no reason to suspect a leak at this time, but if the can of r134 does not
do
> the trick, then I'll need to take it somewhere for service.
>
> All I can do to the AC system is put the stuff in, and I have to ask to be
> sure I have the process right.
>
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: Charging my Air Conditioner
 

Hi Jeff,
If you have over filled it in the past, as I have and wasted some
through the pop off valve, then you may have also have ruined the low
pressure switch that sits on the dyer that is bypassed on the cycles you
describe. If so it simply unscrews without losing any pressure. A good rule
of thumb would be 35 psi on low and not over 275 psi on high side:
http://www.redhillsupply.com/blog/20...-question.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"Jeff Strickland" <crwlr@verizon.net> wrote in message
news:1i90i.8227$HR1.3924@trnddc01...
> The AC compressor clutch cycles on for about 2 seconds then off for about
3
> seconds then repeats. It never blows cold. It worked fine a few days ago,
so
> this is a sudden onset of symptoms.
>
> I have R134a. I also have a guage that plugs onto the Low Pressure Port.
The
> sad thing is that I've not used it for a few years and I forgot how.
>
> I have to connect either the guage or the fitting that connects to the can
> of stuff, but I can not connect both at the same time. I think I have to
> take a pressure reading to make sure it is low. My guage has GRN, BLU,
YEL,
> and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
46,
> and red is anything above 65, the guage limit is 200.
>
> I need to re-understand the directions.
>
> I _think_ I want the needle to be in the blue area or yellow area, but by
no
> means in the red or green areas. I have not checked yet, but I suspect it
> currently is in the green area. Once I ensure that the pressure is indeed
> low, then I can add a can of R134. One can should bring the pressure to
> 45ish psi.
>
> I _think_ what is happening now is that my pressure is right on the line,
> and when the compressor kicks in, the result is pressure drop below the
> threshold of the Low Pressure Switch, so the compressor kicks out. This
> causes the pressure to rise and satisfy the Low Pressure Switch, so the
> compressor kicks on again. The problem repeats from there, and the
> compressor clutch kicks on and off due to activity of the Low Pressure
> Switch.
>
> I've owned the vehicle for a year, and have done virtually nothing to it.
It
> has worked perfectly until today, when the AC elected to go offline. I
have
> no reason to suspect a leak at this time, but if the can of r134 does not
do
> the trick, then I'll need to take it somewhere for service.
>
> All I can do to the AC system is put the stuff in, and I have to ask to be
> sure I have the process right.
>
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: Charging my Air Conditioner
 

Hi Jeff,
If you have over filled it in the past, as I have and wasted some
through the pop off valve, then you may have also have ruined the low
pressure switch that sits on the dyer that is bypassed on the cycles you
describe. If so it simply unscrews without losing any pressure. A good rule
of thumb would be 35 psi on low and not over 275 psi on high side:
http://www.redhillsupply.com/blog/20...-question.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"Jeff Strickland" <crwlr@verizon.net> wrote in message
news:1i90i.8227$HR1.3924@trnddc01...
> The AC compressor clutch cycles on for about 2 seconds then off for about
3
> seconds then repeats. It never blows cold. It worked fine a few days ago,
so
> this is a sudden onset of symptoms.
>
> I have R134a. I also have a guage that plugs onto the Low Pressure Port.
The
> sad thing is that I've not used it for a few years and I forgot how.
>
> I have to connect either the guage or the fitting that connects to the can
> of stuff, but I can not connect both at the same time. I think I have to
> take a pressure reading to make sure it is low. My guage has GRN, BLU,
YEL,
> and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
46,
> and red is anything above 65, the guage limit is 200.
>
> I need to re-understand the directions.
>
> I _think_ I want the needle to be in the blue area or yellow area, but by
no
> means in the red or green areas. I have not checked yet, but I suspect it
> currently is in the green area. Once I ensure that the pressure is indeed
> low, then I can add a can of R134. One can should bring the pressure to
> 45ish psi.
>
> I _think_ what is happening now is that my pressure is right on the line,
> and when the compressor kicks in, the result is pressure drop below the
> threshold of the Low Pressure Switch, so the compressor kicks out. This
> causes the pressure to rise and satisfy the Low Pressure Switch, so the
> compressor kicks on again. The problem repeats from there, and the
> compressor clutch kicks on and off due to activity of the Low Pressure
> Switch.
>
> I've owned the vehicle for a year, and have done virtually nothing to it.
It
> has worked perfectly until today, when the AC elected to go offline. I
have
> no reason to suspect a leak at this time, but if the can of r134 does not
do
> the trick, then I'll need to take it somewhere for service.
>
> All I can do to the AC system is put the stuff in, and I have to ask to be
> sure I have the process right.
>
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: Charging my Air Conditioner
 

For that he needs a gauge manifold with high and low gauges and a charging
hose, which won't break the bank. A basic AC service and training manual
will cost about $20.00. For R134a systems, "the only right way" to charge
the system is to evacuate it with a charging station and then refill to the
correct amount of refrigerant. People have gotten these systems working by
guestimation though. If it is low enough to stop working it is pretty close
to empty.

For tools, http://www.acsource.com/index.asp, click on "Gauge Sets" and
"Manuals". The Mastercool Basic Service Training Manual is great. It is so
much easier when you have some vague idea of what you are doing.

Earle

"L.W. (Bill) ------ III" <----------@cox.net> wrote in message
news:464123bf$0$16267$88260bb3@free.teranews.com.. .
> Hi Jeff,
> If you have over filled it in the past, as I have and wasted some
> through the pop off valve, then you may have also have ruined the low
> pressure switch that sits on the dyer that is bypassed on the cycles you
> describe. If so it simply unscrews without losing any pressure. A good
rule
> of thumb would be 35 psi on low and not over 275 psi on high side:
>
http://www.redhillsupply.com/blog/20...-question.html
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "Jeff Strickland" <crwlr@verizon.net> wrote in message
> news:1i90i.8227$HR1.3924@trnddc01...
> > The AC compressor clutch cycles on for about 2 seconds then off for
about
> 3
> > seconds then repeats. It never blows cold. It worked fine a few days
ago,
> so
> > this is a sudden onset of symptoms.
> >
> > I have R134a. I also have a guage that plugs onto the Low Pressure Port.
> The
> > sad thing is that I've not used it for a few years and I forgot how.
> >
> > I have to connect either the guage or the fitting that connects to the
can
> > of stuff, but I can not connect both at the same time. I think I have to
> > take a pressure reading to make sure it is low. My guage has GRN, BLU,
> YEL,
> > and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
> 46,
> > and red is anything above 65, the guage limit is 200.
> >
> > I need to re-understand the directions.
> >
> > I _think_ I want the needle to be in the blue area or yellow area, but
by
> no
> > means in the red or green areas. I have not checked yet, but I suspect
it
> > currently is in the green area. Once I ensure that the pressure is
indeed
> > low, then I can add a can of R134. One can should bring the pressure to
> > 45ish psi.
> >
> > I _think_ what is happening now is that my pressure is right on the
line,
> > and when the compressor kicks in, the result is pressure drop below the
> > threshold of the Low Pressure Switch, so the compressor kicks out. This
> > causes the pressure to rise and satisfy the Low Pressure Switch, so the
> > compressor kicks on again. The problem repeats from there, and the
> > compressor clutch kicks on and off due to activity of the Low Pressure
> > Switch.
> >
> > I've owned the vehicle for a year, and have done virtually nothing to
it.
> It
> > has worked perfectly until today, when the AC elected to go offline. I
> have
> > no reason to suspect a leak at this time, but if the can of r134 does
not
> do
> > the trick, then I'll need to take it somewhere for service.
> >
> > All I can do to the AC system is put the stuff in, and I have to ask to
be
> > sure I have the process right.
> >
> >
> >
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

Re: Charging my Air Conditioner
 

For that he needs a gauge manifold with high and low gauges and a charging
hose, which won't break the bank. A basic AC service and training manual
will cost about $20.00. For R134a systems, "the only right way" to charge
the system is to evacuate it with a charging station and then refill to the
correct amount of refrigerant. People have gotten these systems working by
guestimation though. If it is low enough to stop working it is pretty close
to empty.

For tools, http://www.acsource.com/index.asp, click on "Gauge Sets" and
"Manuals". The Mastercool Basic Service Training Manual is great. It is so
much easier when you have some vague idea of what you are doing.

Earle

"L.W. (Bill) ------ III" <----------@cox.net> wrote in message
news:464123bf$0$16267$88260bb3@free.teranews.com.. .
> Hi Jeff,
> If you have over filled it in the past, as I have and wasted some
> through the pop off valve, then you may have also have ruined the low
> pressure switch that sits on the dyer that is bypassed on the cycles you
> describe. If so it simply unscrews without losing any pressure. A good
rule
> of thumb would be 35 psi on low and not over 275 psi on high side:
>
http://www.redhillsupply.com/blog/20...-question.html
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "Jeff Strickland" <crwlr@verizon.net> wrote in message
> news:1i90i.8227$HR1.3924@trnddc01...
> > The AC compressor clutch cycles on for about 2 seconds then off for
about
> 3
> > seconds then repeats. It never blows cold. It worked fine a few days
ago,
> so
> > this is a sudden onset of symptoms.
> >
> > I have R134a. I also have a guage that plugs onto the Low Pressure Port.
> The
> > sad thing is that I've not used it for a few years and I forgot how.
> >
> > I have to connect either the guage or the fitting that connects to the
can
> > of stuff, but I can not connect both at the same time. I think I have to
> > take a pressure reading to make sure it is low. My guage has GRN, BLU,
> YEL,
> > and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
> 46,
> > and red is anything above 65, the guage limit is 200.
> >
> > I need to re-understand the directions.
> >
> > I _think_ I want the needle to be in the blue area or yellow area, but
by
> no
> > means in the red or green areas. I have not checked yet, but I suspect
it
> > currently is in the green area. Once I ensure that the pressure is
indeed
> > low, then I can add a can of R134. One can should bring the pressure to
> > 45ish psi.
> >
> > I _think_ what is happening now is that my pressure is right on the
line,
> > and when the compressor kicks in, the result is pressure drop below the
> > threshold of the Low Pressure Switch, so the compressor kicks out. This
> > causes the pressure to rise and satisfy the Low Pressure Switch, so the
> > compressor kicks on again. The problem repeats from there, and the
> > compressor clutch kicks on and off due to activity of the Low Pressure
> > Switch.
> >
> > I've owned the vehicle for a year, and have done virtually nothing to
it.
> It
> > has worked perfectly until today, when the AC elected to go offline. I
> have
> > no reason to suspect a leak at this time, but if the can of r134 does
not
> do
> > the trick, then I'll need to take it somewhere for service.
> >
> > All I can do to the AC system is put the stuff in, and I have to ask to
be
> > sure I have the process right.
> >
> >
> >
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

Re: Charging my Air Conditioner
 

For that he needs a gauge manifold with high and low gauges and a charging
hose, which won't break the bank. A basic AC service and training manual
will cost about $20.00. For R134a systems, "the only right way" to charge
the system is to evacuate it with a charging station and then refill to the
correct amount of refrigerant. People have gotten these systems working by
guestimation though. If it is low enough to stop working it is pretty close
to empty.

For tools, http://www.acsource.com/index.asp, click on "Gauge Sets" and
"Manuals". The Mastercool Basic Service Training Manual is great. It is so
much easier when you have some vague idea of what you are doing.

Earle

"L.W. (Bill) ------ III" <----------@cox.net> wrote in message
news:464123bf$0$16267$88260bb3@free.teranews.com.. .
> Hi Jeff,
> If you have over filled it in the past, as I have and wasted some
> through the pop off valve, then you may have also have ruined the low
> pressure switch that sits on the dyer that is bypassed on the cycles you
> describe. If so it simply unscrews without losing any pressure. A good
rule
> of thumb would be 35 psi on low and not over 275 psi on high side:
>
http://www.redhillsupply.com/blog/20...-question.html
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "Jeff Strickland" <crwlr@verizon.net> wrote in message
> news:1i90i.8227$HR1.3924@trnddc01...
> > The AC compressor clutch cycles on for about 2 seconds then off for
about
> 3
> > seconds then repeats. It never blows cold. It worked fine a few days
ago,
> so
> > this is a sudden onset of symptoms.
> >
> > I have R134a. I also have a guage that plugs onto the Low Pressure Port.
> The
> > sad thing is that I've not used it for a few years and I forgot how.
> >
> > I have to connect either the guage or the fitting that connects to the
can
> > of stuff, but I can not connect both at the same time. I think I have to
> > take a pressure reading to make sure it is low. My guage has GRN, BLU,
> YEL,
> > and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
> 46,
> > and red is anything above 65, the guage limit is 200.
> >
> > I need to re-understand the directions.
> >
> > I _think_ I want the needle to be in the blue area or yellow area, but
by
> no
> > means in the red or green areas. I have not checked yet, but I suspect
it
> > currently is in the green area. Once I ensure that the pressure is
indeed
> > low, then I can add a can of R134. One can should bring the pressure to
> > 45ish psi.
> >
> > I _think_ what is happening now is that my pressure is right on the
line,
> > and when the compressor kicks in, the result is pressure drop below the
> > threshold of the Low Pressure Switch, so the compressor kicks out. This
> > causes the pressure to rise and satisfy the Low Pressure Switch, so the
> > compressor kicks on again. The problem repeats from there, and the
> > compressor clutch kicks on and off due to activity of the Low Pressure
> > Switch.
> >
> > I've owned the vehicle for a year, and have done virtually nothing to
it.
> It
> > has worked perfectly until today, when the AC elected to go offline. I
> have
> > no reason to suspect a leak at this time, but if the can of r134 does
not
> do
> > the trick, then I'll need to take it somewhere for service.
> >
> > All I can do to the AC system is put the stuff in, and I have to ask to
be
> > sure I have the process right.
> >
> >
> >
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

Re: Charging my Air Conditioner
 

For that he needs a gauge manifold with high and low gauges and a charging
hose, which won't break the bank. A basic AC service and training manual
will cost about $20.00. For R134a systems, "the only right way" to charge
the system is to evacuate it with a charging station and then refill to the
correct amount of refrigerant. People have gotten these systems working by
guestimation though. If it is low enough to stop working it is pretty close
to empty.

For tools, http://www.acsource.com/index.asp, click on "Gauge Sets" and
"Manuals". The Mastercool Basic Service Training Manual is great. It is so
much easier when you have some vague idea of what you are doing.

Earle

"L.W. (Bill) ------ III" <----------@cox.net> wrote in message
news:464123bf$0$16267$88260bb3@free.teranews.com.. .
> Hi Jeff,
> If you have over filled it in the past, as I have and wasted some
> through the pop off valve, then you may have also have ruined the low
> pressure switch that sits on the dyer that is bypassed on the cycles you
> describe. If so it simply unscrews without losing any pressure. A good
rule
> of thumb would be 35 psi on low and not over 275 psi on high side:
>
http://www.redhillsupply.com/blog/20...-question.html
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
>
> "Jeff Strickland" <crwlr@verizon.net> wrote in message
> news:1i90i.8227$HR1.3924@trnddc01...
> > The AC compressor clutch cycles on for about 2 seconds then off for
about
> 3
> > seconds then repeats. It never blows cold. It worked fine a few days
ago,
> so
> > this is a sudden onset of symptoms.
> >
> > I have R134a. I also have a guage that plugs onto the Low Pressure Port.
> The
> > sad thing is that I've not used it for a few years and I forgot how.
> >
> > I have to connect either the guage or the fitting that connects to the
can
> > of stuff, but I can not connect both at the same time. I think I have to
> > take a pressure reading to make sure it is low. My guage has GRN, BLU,
> YEL,
> > and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45 to
> 46,
> > and red is anything above 65, the guage limit is 200.
> >
> > I need to re-understand the directions.
> >
> > I _think_ I want the needle to be in the blue area or yellow area, but
by
> no
> > means in the red or green areas. I have not checked yet, but I suspect
it
> > currently is in the green area. Once I ensure that the pressure is
indeed
> > low, then I can add a can of R134. One can should bring the pressure to
> > 45ish psi.
> >
> > I _think_ what is happening now is that my pressure is right on the
line,
> > and when the compressor kicks in, the result is pressure drop below the
> > threshold of the Low Pressure Switch, so the compressor kicks out. This
> > causes the pressure to rise and satisfy the Low Pressure Switch, so the
> > compressor kicks on again. The problem repeats from there, and the
> > compressor clutch kicks on and off due to activity of the Low Pressure
> > Switch.
> >
> > I've owned the vehicle for a year, and have done virtually nothing to
it.
> It
> > has worked perfectly until today, when the AC elected to go offline. I
> have
> > no reason to suspect a leak at this time, but if the can of r134 does
not
> do
> > the trick, then I'll need to take it somewhere for service.
> >
> > All I can do to the AC system is put the stuff in, and I have to ask to
be
> > sure I have the process right.
> >
> >
> >
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

Re: Charging my Air Conditioner
 

"Jeff Strickland" <crwlr@verizon.net> wrote in message
news:1i90i.8227$HR1.3924@trnddc01...
> The AC compressor clutch cycles on for about 2 seconds then off for about
> 3 seconds then repeats. It never blows cold. It worked fine a few days
> ago, so this is a sudden onset of symptoms.
>
> I have R134a. I also have a guage that plugs onto the Low Pressure Port.
> The sad thing is that I've not used it for a few years and I forgot how.
>
> I have to connect either the guage or the fitting that connects to the can
> of stuff, but I can not connect both at the same time. I think I have to
> take a pressure reading to make sure it is low. My guage has GRN, BLU,
> YEL, and RED sections. Green is 0 to 25psi, blue is 25 to 45, yellow is 45
> to 46, and red is anything above 65, the guage limit is 200.
>
> I need to re-understand the directions.
>
> I _think_ I want the needle to be in the blue area or yellow area, but by
> no means in the red or green areas. I have not checked yet, but I suspect
> it currently is in the green area. Once I ensure that the pressure is
> indeed low, then I can add a can of R134. One can should bring the
> pressure to 45ish psi.
>
> I _think_ what is happening now is that my pressure is right on the line,
> and when the compressor kicks in, the result is pressure drop below the
> threshold of the Low Pressure Switch, so the compressor kicks out. This
> causes the pressure to rise and satisfy the Low Pressure Switch, so the
> compressor kicks on again. The problem repeats from there, and the
> compressor clutch kicks on and off due to activity of the Low Pressure
> Switch.
>
> I've owned the vehicle for a year, and have done virtually nothing to it.
> It has worked perfectly until today, when the AC elected to go offline. I
> have no reason to suspect a leak at this time, but if the can of r134 does
> not do the trick, then I'll need to take it somewhere for service.
>
> All I can do to the AC system is put the stuff in, and I have to ask to be
> sure I have the process right.

The short answer is; it's low on refrigerant Jeff.
What vehicle is it?
Does it have a sight glass?

Spdloader