Yup, another '98 TJ with no A\C
 

Hey all,

I've been reading the MANY posts and sites about TJ's and air conditioning
problems, but didn't find a definite answer to my symptoms. I hope to hell
it's not the evaporator.

So, here's the deal:

-compressor is working normally
-blower fan is working normally
-air dampers appear to be working normally
-tube from compressor to condenser is hot
-tube from condenser into firewall/evaporator is nice and cold
-tube OUT from firewall/evaporator is warm.. like air temperature warm. ( I
would assume this would be fairly cool as well, since the evaporator
probably isn't 100% efficient? )
-airflow inside the cabin is KIND of cool, but definitely not cold.. hard to
tell if it's just air temp, but it may feel cooler just because of the rapid
air flow..
-hot/cold selector seems to be working fine.. definitely HOT air when
switched to hot.

I took most of the dash off, to see the cables, dampers etc, and to see if
there's some kind of physical blockage in there.. nothing obvious.

Before I completely take out the heater/ac housing, do these symptoms tell
you anything concrete about the evaporator?

Thanks!

Tim

Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34

Re: Yup, another '98 TJ with no A\C
 

Actually the tube FROM the firewall/evaporator TO the low side of the
compressor should be cold. The one From the Compressor high side to the
condenser should be hot. From the condenser to the firewall/Evaporator
should be warm/less hot then the one from the compressor out to the
condenser.

I would first suspect the air flaps since the compressor is working. If you
were low on freon from a leak, the compressor not be working.

JoBo

"Diezmon" <notmyrealemail@fakeemail.com> wrote in message
news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to
> hell
> it's not the evaporator.
>
> So, here's the deal:
>
> -compressor is working normally
> -blower fan is working normally
> -air dampers appear to be working normally
> -tube from compressor to condenser is hot
> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )
> -airflow inside the cabin is KIND of cool, but definitely not cold.. hard
> to
> tell if it's just air temp, but it may feel cooler just because of the
> rapid
> air flow..
> -hot/cold selector seems to be working fine.. definitely HOT air when
> switched to hot.
>
> I took most of the dash off, to see the cables, dampers etc, and to see if
> there's some kind of physical blockage in there.. nothing obvious.
>
> Before I completely take out the heater/ac housing, do these symptoms tell
> you anything concrete about the evaporator?
>
> Thanks!
>
> Tim
>
> Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
>
>

Re: Yup, another '98 TJ with no A\C
 

Actually the tube FROM the firewall/evaporator TO the low side of the
compressor should be cold. The one From the Compressor high side to the
condenser should be hot. From the condenser to the firewall/Evaporator
should be warm/less hot then the one from the compressor out to the
condenser.

I would first suspect the air flaps since the compressor is working. If you
were low on freon from a leak, the compressor not be working.

JoBo

"Diezmon" <notmyrealemail@fakeemail.com> wrote in message
news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to
> hell
> it's not the evaporator.
>
> So, here's the deal:
>
> -compressor is working normally
> -blower fan is working normally
> -air dampers appear to be working normally
> -tube from compressor to condenser is hot
> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )
> -airflow inside the cabin is KIND of cool, but definitely not cold.. hard
> to
> tell if it's just air temp, but it may feel cooler just because of the
> rapid
> air flow..
> -hot/cold selector seems to be working fine.. definitely HOT air when
> switched to hot.
>
> I took most of the dash off, to see the cables, dampers etc, and to see if
> there's some kind of physical blockage in there.. nothing obvious.
>
> Before I completely take out the heater/ac housing, do these symptoms tell
> you anything concrete about the evaporator?
>
> Thanks!
>
> Tim
>
> Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
>
>

Re: Yup, another '98 TJ with no A\C
 

Actually the tube FROM the firewall/evaporator TO the low side of the
compressor should be cold. The one From the Compressor high side to the
condenser should be hot. From the condenser to the firewall/Evaporator
should be warm/less hot then the one from the compressor out to the
condenser.

I would first suspect the air flaps since the compressor is working. If you
were low on freon from a leak, the compressor not be working.

JoBo

"Diezmon" <notmyrealemail@fakeemail.com> wrote in message
news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to
> hell
> it's not the evaporator.
>
> So, here's the deal:
>
> -compressor is working normally
> -blower fan is working normally
> -air dampers appear to be working normally
> -tube from compressor to condenser is hot
> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )
> -airflow inside the cabin is KIND of cool, but definitely not cold.. hard
> to
> tell if it's just air temp, but it may feel cooler just because of the
> rapid
> air flow..
> -hot/cold selector seems to be working fine.. definitely HOT air when
> switched to hot.
>
> I took most of the dash off, to see the cables, dampers etc, and to see if
> there's some kind of physical blockage in there.. nothing obvious.
>
> Before I completely take out the heater/ac housing, do these symptoms tell
> you anything concrete about the evaporator?
>
> Thanks!
>
> Tim
>
> Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
>
>

Re: Yup, another '98 TJ with no A\C
 

Diezmon did pass the time by typing:
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to hell
> it's not the evaporator.
>
> So, here's the deal:

> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm. ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )

Your just slightly low on refrigerant.
The outlet tube should be colder than the inlet tube (expansion of the gas)
(outlet about 5-6 C or 8-10F colder than inlet)
Outlet is the big hose to the accumulator, inlet is the hardline from the condenser

Both tubes going through the firewall should be cold.

--
DougW

Re: Yup, another '98 TJ with no A\C
 

Diezmon did pass the time by typing:
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to hell
> it's not the evaporator.
>
> So, here's the deal:

> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm. ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )

Your just slightly low on refrigerant.
The outlet tube should be colder than the inlet tube (expansion of the gas)
(outlet about 5-6 C or 8-10F colder than inlet)
Outlet is the big hose to the accumulator, inlet is the hardline from the condenser

Both tubes going through the firewall should be cold.

--
DougW

Re: Yup, another '98 TJ with no A\C
 

Diezmon did pass the time by typing:
> Hey all,
>
> I've been reading the MANY posts and sites about TJ's and air conditioning
> problems, but didn't find a definite answer to my symptoms. I hope to hell
> it's not the evaporator.
>
> So, here's the deal:

> -tube from condenser into firewall/evaporator is nice and cold
> -tube OUT from firewall/evaporator is warm.. like air temperature warm. ( I
> would assume this would be fairly cool as well, since the evaporator
> probably isn't 100% efficient? )

Your just slightly low on refrigerant.
The outlet tube should be colder than the inlet tube (expansion of the gas)
(outlet about 5-6 C or 8-10F colder than inlet)
Outlet is the big hose to the accumulator, inlet is the hardline from the condenser

Both tubes going through the firewall should be cold.

--
DougW

Re: Yup, another '98 TJ with no A\C
 

The line from the compressor to the condensor is indeed hot. But, my line
from the condensor TO the firewall/evap is very cold.

Where exactly is the pressure change supposed to be in the system? Based
on what I'm seeing, it seems like the pressure change is IN the condensor
(in is hot, out is cold) does that sound right?

So, next question.. what's a good way to verify the air flaps? All cables
are working, or seem to be working. I wish I could see into the housing
w/out taking the d*mn thing out!

Tim

"Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message
news:cvljg.57488$mh.36654@tornado.ohiordc.rr.com.. .
> Actually the tube FROM the firewall/evaporator TO the low side of the
> compressor should be cold. The one From the Compressor high side to the
> condenser should be hot. From the condenser to the firewall/Evaporator
> should be warm/less hot then the one from the compressor out to the
> condenser.
>
> I would first suspect the air flaps since the compressor is working. If
you
> were low on freon from a leak, the compressor not be working.
>
> JoBo
>
> "Diezmon" <notmyrealemail@fakeemail.com> wrote in message
> news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> > Hey all,
> >
> > I've been reading the MANY posts and sites about TJ's and air
conditioning
> > problems, but didn't find a definite answer to my symptoms. I hope to
> > hell
> > it's not the evaporator.
> >
> > So, here's the deal:
> >
> > -compressor is working normally
> > -blower fan is working normally
> > -air dampers appear to be working normally
> > -tube from compressor to condenser is hot
> > -tube from condenser into firewall/evaporator is nice and cold
> > -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> > ( I
> > would assume this would be fairly cool as well, since the evaporator
> > probably isn't 100% efficient? )
> > -airflow inside the cabin is KIND of cool, but definitely not cold..
hard
> > to
> > tell if it's just air temp, but it may feel cooler just because of the
> > rapid
> > air flow..
> > -hot/cold selector seems to be working fine.. definitely HOT air when
> > switched to hot.
> >
> > I took most of the dash off, to see the cables, dampers etc, and to see
if
> > there's some kind of physical blockage in there.. nothing obvious.
> >
> > Before I completely take out the heater/ac housing, do these symptoms
tell
> > you anything concrete about the evaporator?
> >
> > Thanks!
> >
> > Tim
> >
> > Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
> >
> >
>
>

Re: Yup, another '98 TJ with no A\C
 

The line from the compressor to the condensor is indeed hot. But, my line
from the condensor TO the firewall/evap is very cold.

Where exactly is the pressure change supposed to be in the system? Based
on what I'm seeing, it seems like the pressure change is IN the condensor
(in is hot, out is cold) does that sound right?

So, next question.. what's a good way to verify the air flaps? All cables
are working, or seem to be working. I wish I could see into the housing
w/out taking the d*mn thing out!

Tim

"Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message
news:cvljg.57488$mh.36654@tornado.ohiordc.rr.com.. .
> Actually the tube FROM the firewall/evaporator TO the low side of the
> compressor should be cold. The one From the Compressor high side to the
> condenser should be hot. From the condenser to the firewall/Evaporator
> should be warm/less hot then the one from the compressor out to the
> condenser.
>
> I would first suspect the air flaps since the compressor is working. If
you
> were low on freon from a leak, the compressor not be working.
>
> JoBo
>
> "Diezmon" <notmyrealemail@fakeemail.com> wrote in message
> news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> > Hey all,
> >
> > I've been reading the MANY posts and sites about TJ's and air
conditioning
> > problems, but didn't find a definite answer to my symptoms. I hope to
> > hell
> > it's not the evaporator.
> >
> > So, here's the deal:
> >
> > -compressor is working normally
> > -blower fan is working normally
> > -air dampers appear to be working normally
> > -tube from compressor to condenser is hot
> > -tube from condenser into firewall/evaporator is nice and cold
> > -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> > ( I
> > would assume this would be fairly cool as well, since the evaporator
> > probably isn't 100% efficient? )
> > -airflow inside the cabin is KIND of cool, but definitely not cold..
hard
> > to
> > tell if it's just air temp, but it may feel cooler just because of the
> > rapid
> > air flow..
> > -hot/cold selector seems to be working fine.. definitely HOT air when
> > switched to hot.
> >
> > I took most of the dash off, to see the cables, dampers etc, and to see
if
> > there's some kind of physical blockage in there.. nothing obvious.
> >
> > Before I completely take out the heater/ac housing, do these symptoms
tell
> > you anything concrete about the evaporator?
> >
> > Thanks!
> >
> > Tim
> >
> > Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
> >
> >
>
>

Re: Yup, another '98 TJ with no A\C
 

The line from the compressor to the condensor is indeed hot. But, my line
from the condensor TO the firewall/evap is very cold.

Where exactly is the pressure change supposed to be in the system? Based
on what I'm seeing, it seems like the pressure change is IN the condensor
(in is hot, out is cold) does that sound right?

So, next question.. what's a good way to verify the air flaps? All cables
are working, or seem to be working. I wish I could see into the housing
w/out taking the d*mn thing out!

Tim

"Jo Bo" <jromas SPAM@columbus.rr.com> wrote in message
news:cvljg.57488$mh.36654@tornado.ohiordc.rr.com.. .
> Actually the tube FROM the firewall/evaporator TO the low side of the
> compressor should be cold. The one From the Compressor high side to the
> condenser should be hot. From the condenser to the firewall/Evaporator
> should be warm/less hot then the one from the compressor out to the
> condenser.
>
> I would first suspect the air flaps since the compressor is working. If
you
> were low on freon from a leak, the compressor not be working.
>
> JoBo
>
> "Diezmon" <notmyrealemail@fakeemail.com> wrote in message
> news:SeadnW_9AfPmRxDZnZ2dnUVZ_uqdnZ2d@comcast.com. ..
> > Hey all,
> >
> > I've been reading the MANY posts and sites about TJ's and air
conditioning
> > problems, but didn't find a definite answer to my symptoms. I hope to
> > hell
> > it's not the evaporator.
> >
> > So, here's the deal:
> >
> > -compressor is working normally
> > -blower fan is working normally
> > -air dampers appear to be working normally
> > -tube from compressor to condenser is hot
> > -tube from condenser into firewall/evaporator is nice and cold
> > -tube OUT from firewall/evaporator is warm.. like air temperature warm.
> > ( I
> > would assume this would be fairly cool as well, since the evaporator
> > probably isn't 100% efficient? )
> > -airflow inside the cabin is KIND of cool, but definitely not cold..
hard
> > to
> > tell if it's just air temp, but it may feel cooler just because of the
> > rapid
> > air flow..
> > -hot/cold selector seems to be working fine.. definitely HOT air when
> > switched to hot.
> >
> > I took most of the dash off, to see the cables, dampers etc, and to see
if
> > there's some kind of physical blockage in there.. nothing obvious.
> >
> > Before I completely take out the heater/ac housing, do these symptoms
tell
> > you anything concrete about the evaporator?
> >
> > Thanks!
> >
> > Tim
> >
> > Yikes ==> http://www.diezfamily.us/coppermine/...s.php?album=34
> >
> >
>
>