"DougW" <post.replies@invalid.address> wrote in message
news:RIljg.52874$9c6.2909@dukeread11...
> 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.

According to my refill kit gauge, the pressure is ok. It's a kit that
attaches to the low pressure side. I'm afraid of adding more from the can,
since that would put me in the "RED" zone..

I suppose I should get a more accurate gauge, huh? ;)

Tim

 

"DougW" <post.replies@invalid.address> wrote in message
news:RIljg.52874$9c6.2909@dukeread11...
> 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.

According to my refill kit gauge, the pressure is ok. It's a kit that
attaches to the low pressure side. I'm afraid of adding more from the can,
since that would put me in the "RED" zone..

I suppose I should get a more accurate gauge, huh? ;)

Tim

 

"DougW" <post.replies@invalid.address> wrote in message
news:RIljg.52874$9c6.2909@dukeread11...
> 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.

According to my refill kit gauge, the pressure is ok. It's a kit that
attaches to the low pressure side. I'm afraid of adding more from the can,
since that would put me in the "RED" zone..

I suppose I should get a more accurate gauge, huh? ;)

Tim

 

Diezmon did pass the time by typing:

> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..

Refill kit gauges are not very accurate and 134a systems are extremely picky
about how much gas is in the system. Actually the old pressure system is not
what's recommended. It's either drain/evac/refill with known weight or go
by the temperature delta at the evaporator inlet and outlet.

> I suppose I should get a more accurate gauge, huh? ;)

Yep.

--
DougW

 

Diezmon did pass the time by typing:

> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..

Refill kit gauges are not very accurate and 134a systems are extremely picky
about how much gas is in the system. Actually the old pressure system is not
what's recommended. It's either drain/evac/refill with known weight or go
by the temperature delta at the evaporator inlet and outlet.

> I suppose I should get a more accurate gauge, huh? ;)

Yep.

--
DougW

 

Diezmon did pass the time by typing:

> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..

Refill kit gauges are not very accurate and 134a systems are extremely picky
about how much gas is in the system. Actually the old pressure system is not
what's recommended. It's either drain/evac/refill with known weight or go
by the temperature delta at the evaporator inlet and outlet.

> I suppose I should get a more accurate gauge, huh? ;)

Yep.

--
DougW

 

Check it again while engine running, A/C on and pumping. Your
description told us it's low.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Diezmon wrote:
>
> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..
>
> I suppose I should get a more accurate gauge, huh? ;)
>
> Tim

 

Check it again while engine running, A/C on and pumping. Your
description told us it's low.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Diezmon wrote:
>
> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..
>
> I suppose I should get a more accurate gauge, huh? ;)
>
> Tim

 

Check it again while engine running, A/C on and pumping. Your
description told us it's low.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Diezmon wrote:
>
> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the can,
> since that would put me in the "RED" zone..
>
> I suppose I should get a more accurate gauge, huh? ;)
>
> Tim

 

If you really want to do more than stand there with your thumbs in your
pockets, saying "No ma'am, it sure isn't cooling enough", then you need a
high and low side gauge set, and a basic air conditioning manual. A
thermometer to measure the output air temperature to the cabin is a big help
too.

If you are getting any cooling at all, then chances are really, really good
that you have a simple leak, and low refrigerant. You can do what all the
other shade tree mechanics do, add a 13 oz. can of refrigerant, and hope for
the best. Usually when I get a vehicle, with the symptoms you are
describing, this fixes it for a while. Sooner or later, you will have to
find that leak though. They get worse with time, you know. Soap and water
mixture in an old Windex spray bottle is better than nothing. Red or UV
leak detector in a can can be good, too.

A book like the basic repair manual from acsource.com is probably the best
investment you can make at this point.

Earle

"Diezmon" <notmyrealemail@fakeemail.com> wrote in message
news:bcWdnaZ7p6ktsxPZnZ2dnUVZ_vydnZ2d@comcast.com. ..
>
> "DougW" <post.replies@invalid.address> wrote in message
> news:RIljg.52874$9c6.2909@dukeread11...
> > 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.
>
> According to my refill kit gauge, the pressure is ok. It's a kit that
> attaches to the low pressure side. I'm afraid of adding more from the
can,
> since that would put me in the "RED" zone..
>
> I suppose I should get a more accurate gauge, huh? ;)
>
> Tim
>
>
>



--
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