DougW

PAUL KRAUSE wrote:
> Air Conditioner clutch does not click in or out when turned on. No
> cold air with defroster on or off. Thanks.

Jumper the low side limit switch and try again.
If they AC clutch kicks in then you are low/out of refrigerant.
(this can be due to the valve seal not seating properly)

http://revbeergoggles.com/Fixes/diag...s.html#sensors

If that doesn't work then it is probably a relay or fuse.

The low limit jumper is _not_ a fix. It's only a diagnostic.
Do not run your AC this way as you can burn out the compressor.
It's ok to do for a few minutes or when filling.

--
DougW

Earle Horton

"DougW" <post.replies@invalid.address> wrote in message
news:977Bg.67510$9c6.5877@dukeread11...
> PAUL KRAUSE wrote:
> > Air Conditioner clutch does not click in or out when turned on. No
> > cold air with defroster on or off. Thanks.
>
> Jumper the low side limit switch and try again.
> If they AC clutch kicks in then you are low/out of refrigerant.
> (this can be due to the valve seal not seating properly)
>

Otherwise known as the service port Schräder valve. It is not unheard of
for one of these to start leaking after diagnostic gauges are put on it.
Annoying as hell, but not unheard of.

Also if the clutch does not kick in on jumping the low side switch, suspect
a burnt out clutch coil. Check for burnt smell and open circuit or short to
ground.

It won't hurt anything to look for AC system leaks with a soap bubble test.

Earle

Earle Horton

"DougW" <post.replies@invalid.address> wrote in message
news:977Bg.67510$9c6.5877@dukeread11...
> PAUL KRAUSE wrote:
> > Air Conditioner clutch does not click in or out when turned on. No
> > cold air with defroster on or off. Thanks.
>
> Jumper the low side limit switch and try again.
> If they AC clutch kicks in then you are low/out of refrigerant.
> (this can be due to the valve seal not seating properly)
>

Otherwise known as the service port Schräder valve. It is not unheard of
for one of these to start leaking after diagnostic gauges are put on it.
Annoying as hell, but not unheard of.

Also if the clutch does not kick in on jumping the low side switch, suspect
a burnt out clutch coil. Check for burnt smell and open circuit or short to
ground.

It won't hurt anything to look for AC system leaks with a soap bubble test.

Earle

Earle Horton

"DougW" <post.replies@invalid.address> wrote in message
news:977Bg.67510$9c6.5877@dukeread11...
> PAUL KRAUSE wrote:
> > Air Conditioner clutch does not click in or out when turned on. No
> > cold air with defroster on or off. Thanks.
>
> Jumper the low side limit switch and try again.
> If they AC clutch kicks in then you are low/out of refrigerant.
> (this can be due to the valve seal not seating properly)
>

Otherwise known as the service port Schräder valve. It is not unheard of
for one of these to start leaking after diagnostic gauges are put on it.
Annoying as hell, but not unheard of.

Also if the clutch does not kick in on jumping the low side switch, suspect
a burnt out clutch coil. Check for burnt smell and open circuit or short to
ground.

It won't hurt anything to look for AC system leaks with a soap bubble test.

Earle

Earle Horton

"DougW" <post.replies@invalid.address> wrote in message
news:977Bg.67510$9c6.5877@dukeread11...
> PAUL KRAUSE wrote:
> > Air Conditioner clutch does not click in or out when turned on. No
> > cold air with defroster on or off. Thanks.
>
> Jumper the low side limit switch and try again.
> If they AC clutch kicks in then you are low/out of refrigerant.
> (this can be due to the valve seal not seating properly)
>

Otherwise known as the service port Schräder valve. It is not unheard of
for one of these to start leaking after diagnostic gauges are put on it.
Annoying as hell, but not unheard of.

Also if the clutch does not kick in on jumping the low side switch, suspect
a burnt out clutch coil. Check for burnt smell and open circuit or short to
ground.

It won't hurt anything to look for AC system leaks with a soap bubble test.

Earle

philthy

there could have been a service valve leaking and they left the cap off
which resulted in a leak that had a plug when they checked pressures
or the evap coil is leaking which is a common issue

DougW wrote:

> PAUL KRAUSE wrote:
> > Took my 1999 jeep cherokee sport , to a authorize dealer for a routine
> > air condition check, on july 18th. Everything checked out ok with 38
> > degrees and pressure check good. Today turned on my air conditioner
> > and warm air coming through. No cold air after long wait. Can anyone
> > give me advice on possible problems ? Thanks in advance.
>
> Check to see that they put all the connectors back on.
> There are sensors at the compressor and on top of the accumulator.
>
> It's difficult to mess the system up by just checking it. Difficult
> but not impossible.
>
> Check the fuses and make sure they put the AC relay back in also.
>
> --
> DougW

philthy

there could have been a service valve leaking and they left the cap off
which resulted in a leak that had a plug when they checked pressures
or the evap coil is leaking which is a common issue

DougW wrote:

> PAUL KRAUSE wrote:
> > Took my 1999 jeep cherokee sport , to a authorize dealer for a routine
> > air condition check, on july 18th. Everything checked out ok with 38
> > degrees and pressure check good. Today turned on my air conditioner
> > and warm air coming through. No cold air after long wait. Can anyone
> > give me advice on possible problems ? Thanks in advance.
>
> Check to see that they put all the connectors back on.
> There are sensors at the compressor and on top of the accumulator.
>
> It's difficult to mess the system up by just checking it. Difficult
> but not impossible.
>
> Check the fuses and make sure they put the AC relay back in also.
>
> --
> DougW

philthy

there could have been a service valve leaking and they left the cap off
which resulted in a leak that had a plug when they checked pressures
or the evap coil is leaking which is a common issue

DougW wrote:

> PAUL KRAUSE wrote:
> > Took my 1999 jeep cherokee sport , to a authorize dealer for a routine
> > air condition check, on july 18th. Everything checked out ok with 38
> > degrees and pressure check good. Today turned on my air conditioner
> > and warm air coming through. No cold air after long wait. Can anyone
> > give me advice on possible problems ? Thanks in advance.
>
> Check to see that they put all the connectors back on.
> There are sensors at the compressor and on top of the accumulator.
>
> It's difficult to mess the system up by just checking it. Difficult
> but not impossible.
>
> Check the fuses and make sure they put the AC relay back in also.
>
> --
> DougW

philthy

there could have been a service valve leaking and they left the cap off
which resulted in a leak that had a plug when they checked pressures
or the evap coil is leaking which is a common issue

DougW wrote:

> PAUL KRAUSE wrote:
> > Took my 1999 jeep cherokee sport , to a authorize dealer for a routine
> > air condition check, on july 18th. Everything checked out ok with 38
> > degrees and pressure check good. Today turned on my air conditioner
> > and warm air coming through. No cold air after long wait. Can anyone
> > give me advice on possible problems ? Thanks in advance.
>
> Check to see that they put all the connectors back on.
> There are sensors at the compressor and on top of the accumulator.
>
> It's difficult to mess the system up by just checking it. Difficult
> but not impossible.
>
> Check the fuses and make sure they put the AC relay back in also.
>
> --
> DougW