Strange AC issue

[bigceltic]

X2 or the compressor is trying to lockup and surging the engine. Compressor lockup will torch the clutch and belt, but, not match for the mighty Cummins that will keep on running as things get "interesting".

Probe the wires to the compressor clutch: Does it have 12v? If so you have a mechanical, not electrical, problem. A worn out clutch may have 12V and not start the compressor spinning. Oil leaking on the clutch or from a badly leaking shaft seal can also slip the compressor clutch.

Does the clutch look like it's been hot from slipping?

It does not look like it is hot, as this new issue just started. I will get it tested and diagnosed tomorrow and report back. Thanks to all!

 

[sag2]

The easiest way with minimal equipment, is dump SLOWLY (note the word slowly) as not to let any oil escape. Let it out until just above 0 psi, then weigh in the correct amount, which should be given on the data plate.

Uh, isn't that illegal?

 

[TConver]

Uh, isn't that illegal?

Not if you do it slow enough. Lol

 

[bigceltic]

I always follow the 11th Commandment.... Thou Shalt Not Get Caught.

 

[RVTRKN]

Only for commercial operations, meaning I sell a service for repair. All the private DIY’s do it and as far as I know have no law against it. I bought a 25lb bottle of 134a from Sams Club and they didn't ask for my refrigerant license. I asked the checker if you had to have a license to buy it and the answer was no. Ya, if you are a shop and deal with 134a your required to follow recovery rules. BTW charge it with liquid, and a restrictor if your charging while its running. I can charge on the suction side with liquid, without the restrictor, but then I'm experienced doing it on a daily basis.

 

[MMeier]

kinda what mine was doing ... even after replacing everything. bought a new transducer and works as designed !

 

[bigceltic]

Shop called and diagnosis is compressor and clutch need to be replaced.

 

[GrantP]

I think it was Bob4x4 that mentioned on a different thread that compressor failures were common on 06's. I fought my system for years, had to recharge every year but nobody could find a leak.

Eventually my compressor just died, no intermittent issues, just died. I replaced everything from the compressor to the firewall and haven't had a problem with it in years. Point is, the compressor failure may be a valid diagnosis.

 

[bigceltic]

I think it was Bob4x4 that mentioned on a different thread that compressor failures were common on 06's. I fought my system for years, had to recharge every year but nobody could find a leak.

Eventually my compressor just died, no intermittent issues, just died. I replaced everything from the compressor to the firewall and haven't had a problem with it in years. Point is, the compressor failure may be a valid diagnosis.

The local Brakes Plus has a very competent manager/mechanic - I have had a couple of long dialogs with him and my impression is that he is a knowledgeable, no-nonsense guy, and he has not been pushy at all - so I trust his diagnosis. I am having them replace everything as well - might as well get it done while they are in there. Has been working well for 13 years, so I can't complain too much.

 

[CVR222NV]

I just replaced everything on mine - compressor, accumulator, all lines, plus condenser - the whole system. Oh and fan clutch as well. Had a hell of a time finding the condenser but happy I waited because it is an upgraded part and much more robust than the original condenser. Constructed like a mini radiator. Ran it last weekend on a trip and was nice to have cold air again in the Summer heat in Vegas!

 

[AEdelheit]

I have replaced the compressor on 2 06's that I have owned, used a four seasons one both times and the AC worked better then it ever did new.

 

[GrantP]

I have replaced the compressor on 2 06's that I have owned, used a four seasons one both times and the AC worked better then it ever did new.

Four Seasons for me too, still working great. My wife no longer complains about the AC in the truck.

 

[Jnemjo]

I once had an A/C problem. Symptoms pointed twords low freon so I bought a kit. Follow the instructions to the "T". Didn't fix the problem. Took it to a shop. They found it was a bad safety switch. Guy said I was lucky I didn't injure myself or do damage to the system. Some things, if you're not a specialist are best to take in. Cheep insurance. If you own one of these expensive trucks you can afford to have a shop work on it once in a blue moon.