Search found 271 matches

by Cusser
Sun Oct 15, 2017 8:56 am
Forum: Automotive Air Conditioning Forum
Topic: Car AC blowing warm at high Demand
Replies: 10
Views: 289

Re: Car AC blowing warm at high Demand

I've had to replace an electronic actuator for the blending doors on two GMC vehicles, both stuck in the "hot" position.
by Cusser
Sun Oct 15, 2017 8:54 am
Forum: Automotive Air Conditioning Forum
Topic: Mercedes benz R129 SL fault code 73
Replies: 3
Views: 96

Re: Mercedes benz R129 SL fault code 73

Thanks Cusser.I had it into kwikfit recently who evacuated the system then said they couldn't regas it as it had a leak.I bought an STP EzChill and it was going well and was in the green zone when suddenly the pressure went to zero however a few minutes later it went back suddenly but would not sta...
by Cusser
Sat Oct 14, 2017 12:17 pm
Forum: Automotive Air Conditioning Forum
Topic: Mercedes benz R129 SL fault code 73
Replies: 3
Views: 96

Re: Mercedes benz R129 SL fault code 73

First guess would be that low refrigerant level is getting the pressure switch to do its protection job, and thus preventing the circuit to the compressor clutch from "closing"/completing. So the center part of the AC compressor doesn't engage or turn. Have a shop look at this, they can ac...
by Cusser
Fri Oct 13, 2017 7:40 am
Forum: Automotive Air Conditioning Forum
Topic: 2004 F150 clutch not engaging
Replies: 3
Views: 116

Re: 2004 F150 clutch not engaging

Toddmann wrote:Fixed it. Thanks for response.


Todd - you're supposed to post what was wrong, and what fixed your truck, to help others here !!! We all keep learning.
by Cusser
Thu Oct 12, 2017 6:47 am
Forum: Automotive Air Conditioning Forum
Topic: 2004 F150 clutch not engaging
Replies: 3
Views: 116

Re: 2004 F150 clutch not engaging

A/C clutch will not engage. I can jump with a paper clip at A/C clutch relay and clutch engages and A/C blows cold air. You are likely low on refrigerant or your pressure switch is bad. Do not simply jumper the switch and run the unit, except for the test that you did, can damage the system because...
by Cusser
Tue Oct 10, 2017 10:42 am
Forum: Automotive Air Conditioning Forum
Topic: Car AC blowing warm at high Demand
Replies: 10
Views: 289

Re: Car AC blowing warm at high Demand

Compressor "off" pressures do not tell much. I see where with compressor engaged, and at high engine rpm, that your highest pressure is 200 psi. I'm in hot Arizona, and all my R134a vehicles typically measure 250-275 psi on the high side. Feel your lines going into and leaving the firewall...
by Cusser
Tue Oct 10, 2017 7:13 am
Forum: Automotive Air Conditioning Forum
Topic: Car AC blowing warm at high Demand
Replies: 10
Views: 289

Re: Car AC blowing warm at high Demand

When parked in the sun, remember that seats, dashboard, interior can be alike 140F or more, takes like 15 minutes until the cooling really sets in. Start out with outside air (vent) in because that hot air is COOLER than the interior's air; later switch to recirculate mode.
by Cusser
Mon Oct 09, 2017 6:41 am
Forum: Automotive Air Conditioning Forum
Topic: Car AC blowing warm at high Demand
Replies: 10
Views: 289

Re: Car AC blowing warm at high Demand

You were over 100 grams R134a low when it was re-filled. I wonder if you have leaked refrigerant since then.

Also make sure all your cooling fans are operational.
by Cusser
Sun Oct 01, 2017 7:26 am
Forum: Automotive Air Conditioning Forum
Topic: High Pressure Mystery
Replies: 15
Views: 634

Re: High Pressure Mystery

Wow. several weeks to track this down, when a test can be made with a sheet of paper......

Anyway, good find.
by Cusser
Thu Sep 28, 2017 1:50 pm
Forum: Automotive Air Conditioning Forum
Topic: High Pressure Mystery
Replies: 15
Views: 634

Re: High Pressure Mystery

After you spray the condenser with a hose and find that the high side drops like a rock, check to see if the fans are turning in the proper rotation. Also see if there is air flow going thru the condenser and radiator. Definitely appears to be a condenser air flow problem. This would not be the fir...

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