Search found 171 matches

by GM Tech
Wed Oct 28, 2020 12:03 pm
Forum: Automotive Air Conditioning Forum
Topic: 1995 lumina 3.1 vin m
Replies: 1
Views: 184

Re: 1995 lumina 3.1 vin m

If indeed this is a Olds "W" car sedan or perhaps a Chevy Lumina SUV "U-van" then the condenser fan "waits" until it sees 175psi pressure on the a/c high side outlet pipe to turn on the fan. Why run the fan if not needed? is the logic... Going down the road even on a ho...
by GM Tech
Mon Oct 26, 2020 9:47 pm
Forum: Automotive Air Conditioning Forum
Topic: Need a/c clutch coil removal help!
Replies: 3
Views: 688

Re: Need a/c clutch coil removal help!

If there is no snap ring, then your coil is pressed fit onto the aluminum snout. Use two screwdrivers to pry it off with a rocking back and forth motion. To re-install use an arbor press, or tap it into place with a ball-peen hammer and punch.
by GM Tech
Sun Aug 16, 2020 1:46 am
Forum: Automotive Air Conditioning Forum
Topic: 2003Envoy XL Dual AC 4.2L Weak Cooling
Replies: 3
Views: 785

Re: 2003Envoy XL Dual AC 4.2L Weak Cooling

65% of mobile a/c complaints are due to lack of cooling due to loss of refrigerant......put that in your pipe and smoke it!

This is from my 5200 car database....
by GM Tech
Sun Aug 16, 2020 1:43 am
Forum: Automotive Air Conditioning Forum
Topic: Oil Balance Question
Replies: 9
Views: 1247

Re: Oil Balance Question

If it makes you feel any better- just know that absolutely every automotive compressor built was installed in its vehicle home with the entire system charge amount of oil in its belly! So I'm not a big fan of oil distribution upon repairs. I worked for Delphi for 30 years and have been in every N. A...
by GM Tech
Sat Jul 18, 2020 2:04 am
Forum: Automotive Air Conditioning Forum
Topic: Jeep Liberty AC Compressor question
Replies: 10
Views: 2013

Re: Jeep Liberty AC Compressor question

It is not the engine warming that does it so much as the coil warming--the resistance has to increase and the windings get warm- both by engine heat and more so by electrical resistance...
by GM Tech
Tue Jul 14, 2020 10:37 am
Forum: Automotive Air Conditioning Forum
Topic: Help identifying an odd fitting
Replies: 3
Views: 773

Re: Help identifying an odd fitting

Under that adapter is the original R-12 fitting--they only did the low side adapter--some folks are lazy....
by GM Tech
Tue Jul 14, 2020 10:34 am
Forum: Automotive Air Conditioning Forum
Topic: Jeep Liberty AC Compressor question
Replies: 10
Views: 2013

Re: Jeep Liberty AC Compressor question

This is a real common scenario- seen it numerous times. Clutch air gap has worn too wide such that the magnetic pull of the coil cannot pull in clutch driver after the coil warms- and electrical resistance increases. To prove this, next time it "should be running" tap on front of clutch wi...
by GM Tech
Sun May 17, 2020 12:59 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 silverado ac drier frosts up
Replies: 4
Views: 1949

Re: 99 silverado ac drier frosts up

Frosty A/D is Bad? News to me. Really humid conditions shows great cooling....
by GM Tech
Sun Sep 15, 2019 7:14 pm
Forum: Automotive Air Conditioning Forum
Topic: Dodge Diesel Trucks Poor AC Performance
Replies: 2
Views: 2557

Re: Dodge Diesel Trucks Poor AC Performance

Diesels run much slower rpms than gasoline-- so the compressor hardly ever goes above 2000 rpm- and they idle much slower as well
by GM Tech
Sun Sep 01, 2019 4:19 am
Forum: Automotive Air Conditioning Forum
Topic: Expert help needed PLS!
Replies: 4
Views: 3012

Re: Expert help needed PLS!

It is a diode- J cars used diodes in compressor circuit. Since you can engage compressor by jumping relay, it is obvious your issue is upstream. Look at the high side transducer- you know it is a transducer because it has 3 wires (upside down near top of radiator) look for wires loose, broken, also ...

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