Automotive Air Conditioning Forum • Re: AC Stopped Cooling
Automotive Air Conditioning Forum
by Tim
7h ago
The compressor has a clutch and a control valve. 14-0667new Statistics: Posted by Tim — Wed May 29, 2024 1:11 am ..read more
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Automotive Air Conditioning Forum • Forum Site donation link.
Automotive Air Conditioning Forum
by Tim
8h ago
https://www.paypal.com/paypalme/acforum ... le.x=en_US Statistics: Posted by Tim — Tue May 28, 2024 11:52 pm ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by Kourso
9h ago
Yes I do have a good set of Robinair ac gauges & a good elect. vacuum pump. And when it was needed, I have also flushed an auto AC system. And I do operate an huge industrial propane refrigeration system in a big NGL frac plant. So I know how refrigeration systems work. I just don’t know about all of the automotive AC system complexities such as the elect. control valve using a PCM signal. Thank you for your help Statistics: Posted by Kourso — Tue May 28, 2024 10:40 pm ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by JohnHere
11h ago
This^^, tbirdtbird. I would say needlessly complex in most cases. OP, if we can "assume" (there's that word again) that the wiring, PCM/ECM, and sensors are okay (and they probably are on a Toyota), there's really no reason why you can't tackle this job yourself if you're accustomed to working on simpler systems, as long as you have the proper tools: Manifold Gauge Set, a good electrically driven vacuum pump, a refrigerant scale, hand tools--and of course, virgin R-134a and PAG-46 oil. You can always job-out refrigerant recovery. Since cost is a factor, compare how much it would be if you DIY ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by Kourso
11h ago
Thanks for your help. Statistics: Posted by Kourso — Tue May 28, 2024 9:17 pm ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by tbirdtbird
12h ago
Most auto AC systems now are more complicated than in the past. Some of us would say over complicated Statistics: Posted by tbirdtbird — Tue May 28, 2024 9:08 pm ..read more
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Automotive Air Conditioning Forum • Re: Ac blows cold, then warm.
Automotive Air Conditioning Forum
by JohnHere
12h ago
Some additional considerations: If my memory is correct, I believe your car has a scroll-type compressor with a thermal switch (TS), which costs almost as much as a brand-new compressor that comes with a new clutch and TS. If it turns out that the TS has failed, consider replacing the entire compressor. Is the compressor noisy, and how many miles has this Civic logged? Statistics: Posted by JohnHere — Tue May 28, 2024 8:48 pm ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by Kourso
12h ago
Great technical explanation! This Toyota AC system is more complicated than the ac systems that I have worked on. So the AC comp. can theoretically be engaged & the elect control valve not be getting the PCM signal per bad wire and/or connections? I think I will have to find a local mechanic shop that does AC repair. Thank you Statistics: Posted by Kourso — Tue May 28, 2024 8:30 pm ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by JohnHere
12h ago
In a nutshell, the ECM/PCM analyzes various sensor input from the vehicle and sends small electrical signals to the compressor control valve depending on how much demand (heat load) is placed on the A/C system. The control valve then changes the compressor's piston stroke (displacement), via the angle of an internal "wobble plate," to meet the demand--low heat load equals minimum piston stroke/displacement and low refrigerant flow; high heat load equals maximum piston stroke/displacement and high refrigerant flow--and all points in between. Statistics: Posted by JohnHere — Tue May 28, 2024 8:1 ..read more
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Automotive Air Conditioning Forum • Re: 2005 Avalon XLS AC air vent temps
Automotive Air Conditioning Forum
by Kourso
13h ago
Thank all of you for your great assistance! I do plan to keep the 05 Avalon, don’t want to put too much money into the car but I really need a working AC in S. Louisiana! I’ll have to decide what I should do. How does the elect. control valve work & what actually controls it? Statistics: Posted by Kourso — Tue May 28, 2024 7:26 pm ..read more
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