Search found 81 matches

by JohnHere
Sun Jul 15, 2018 2:58 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 Caddy blows O ring compressor high side
Replies: 5
Views: 62

Re: 99 Caddy blows O ring compressor high side

Oh, oh...four ounces of UV dye is way too much. You need less than one-fourth of that amount next time, only about one-half ounce or so. Flushing the evaporator and lines (if they don't have mufflers), then installing the new components sounds like a good plan. Even with a full charge, the new compr...
by JohnHere
Sun Jul 15, 2018 10:41 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Caddy blows O ring compressor high side
Replies: 5
Views: 62

Re: 99 Caddy blows O ring compressor high side

Okay, I posted before I saw your second post. If you have Black Death, the compressor is toast. The system will need to be flushed and components replaced.
by JohnHere
Sun Jul 15, 2018 10:34 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Caddy blows O ring compressor high side
Replies: 5
Views: 62

Re: 99 Caddy blows O ring compressor high side

I see that you posted your issue on another thread. That confused me until I noticed that your original post went unanswered. You should have just posted a second time on your original thread, which would have moved your questions to the top of the forum list. Regardless, I'll try offering some thou...
by JohnHere
Sat Jul 14, 2018 6:58 pm
Forum: Automotive Air Conditioning Forum
Topic: Compressor works then stops for a day or two
Replies: 1
Views: 62

Re: Compressor works then stops for a day or two

A gunked-up orifice tube like you described often means an internally disintegrating compressor. At this point, putting more oil (and refrigerant) in the system is futile if the compressor is already chewed up inside. To get the A/C going again, you'll need to replace the compressor, condenser, accu...
by JohnHere
Sat Jul 14, 2018 5:59 pm
Forum: Automotive Air Conditioning Forum
Topic: HELP
Replies: 1
Views: 53

Re: HELP

I suggest getting the vehicle to a reputable A/C shop to recover whatever refrigerant is in it, evacuate, and recharge it precisely by weight. Then they'll evaluate both the low-side and high-side pressures and make repair recommendations from there. Those recharge kits with a single gauge are notor...
by JohnHere
Sat Jul 14, 2018 11:03 am
Forum: Automotive Air Conditioning Forum
Topic: 2008 Mazda 3 troubleshooting
Replies: 3
Views: 42

Re: 2008 Mazda 3 troubleshooting

I think your vehicle has a hot-water valve. If so, have you checked it to ensure that it's fully closing and not introducing any unwanted heat into the system? You can do that fairly easily by pinching off the hoses with padded locking pliers before and after the valve.
by JohnHere
Sat Jul 14, 2018 6:09 am
Forum: Automotive Air Conditioning Forum
Topic: Black death? Dry soot?
Replies: 7
Views: 133

Re: Black death? Dry soot?

Sorry you didn't receive an immediate reply. I've been thinking on this for a little while. I believe bohica nailed it, though. I can't say for sure 'exactly' where the oil went, but it does sound as though the compressor ran completely dry and ground itself into oblivion. The material from the comp...
by JohnHere
Fri Jul 13, 2018 12:39 pm
Forum: Automotive Air Conditioning Forum
Topic: Challenger Tractor A/C Problems...
Replies: 3
Views: 34

Re: Challenger A/C Problems...

I've never worked on a CAT Challenger. Nevertheless, mobile A/C theory is essentially the same regardless of vehicle, so I'll jump in with some questions. I have replaced compressor, accumulator, orifice tube - flushed out complete system - new thermostatic switch and low pressure cycling switch... ...
by JohnHere
Wed Jul 11, 2018 8:14 pm
Forum: Automotive Air Conditioning Forum
Topic: Black death? Dry soot?
Replies: 7
Views: 133

Re: Black death? Dry soot?

Did you accidentally post to the wrong thread? This one began with an '87 Chevy truck and you're talking about a '99 Cadillac DeVille. I'm confused.

As for the orifice tube, the long screened part should point toward the condenser, not the evaporator.
by JohnHere
Wed Jul 11, 2018 3:26 pm
Forum: Automotive Air Conditioning Forum
Topic: Low side too high
Replies: 5
Views: 108

Re: Low side too high

The POA Update Kit replaces the POA valve with what amounts to a straight-through tube and a pressure switch, which is calibrated to turn the compressor clutch on and off to prevent evaporator icing. The original POA valve regulates evaporator pressure by means of internal valving to prevent evapora...

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