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by bohica2xo
Sun May 24, 2020 5:42 pm
Forum: Automotive Air Conditioning Forum
Topic: R4 compressor NEVER cycles
Replies: 15
Views: 111

Re: R4 compressor NEVER cycles

Well, you have changed the pressure switch at least once. What is the low side pressure when you believe you are seeing ice buildup on the evaporator?

You could simply adjust the cut out pressure up a little on the cycling switch - IF it is in fact building ice.
by bohica2xo
Sun May 24, 2020 3:09 pm
Forum: Automotive Air Conditioning Forum
Topic: R4 compressor NEVER cycles
Replies: 15
Views: 111

Re: R4 compressor NEVER cycles

So it can cycle, you just never get enough liquid built up in the accumulator to drop the pressure.

GM used an insulator for the accumulator on some models. Part number 15-10614

Might give that a try.
by bohica2xo
Sun May 24, 2020 1:46 pm
Forum: Automotive Air Conditioning Forum
Topic: R4 compressor NEVER cycles
Replies: 15
Views: 111

Re: R4 compressor NEVER cycles

If you pull the connector off of the cycling switch, does the compressor stop?
by bohica2xo
Thu May 21, 2020 5:13 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 896

Re: Motorhome R134 Problems

Just like I said before:

"A Switch Problem"

When I asked if there was a thermostat involved you answered that it cycled on pressure switches.

So by providing useless information in post after post you never got a solution.

320 psi @ 70f is still overcharged.

Good luck.
by bohica2xo
Thu May 21, 2020 7:54 am
Forum: Automotive Air Conditioning Forum
Topic: Am I really crazy?
Replies: 6
Views: 533

Re: Am I really crazy?

Got a patent number for that one? Love to see it.

The Typhoon already had a liquid intercooler, so the conversion was begging to be done.
by bohica2xo
Wed May 20, 2020 1:45 pm
Forum: Automotive Air Conditioning Forum
Topic: Am I really crazy?
Replies: 6
Views: 533

Re: Am I really crazy?

No, not as crazy as you think. I did a similar thing to a Typhoon for a customer back in 1992. I used a large ice chest mounted in the cargo area to hold the tank and heat exchanger assembly. Air to liquid intercooler in the engine bay. We circulated 50% antifreeze / water mixture. Used a flexible i...
by bohica2xo
Wed May 20, 2020 1:05 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 896

Re: Motorhome R134 Problems

Ok, so now the high side is 200+ when the pump is running - not 110. At 70F ambient a condenser with good airflow should be under 200 psi on the high side.

Just how big is this condenser? And how big is the evaporator?
by bohica2xo
Tue May 19, 2020 4:43 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 896

Re: Motorhome R134 Problems

None of your number add up. First post you claim 110 psi on the high side, 25 to 30 on the low side. Cycling. With an Ambient of 60 F. and only 55f from the vents. Then you post that the system is 25 to 28 on the low side, high side 100 - and the compressor is stopped. Then you added 20 ounces of re...
by bohica2xo
Mon May 18, 2020 5:39 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 896

Re: Motorhome R134 Problems

Static high side pressure of 110 psi is VERY different from running pressures. When you posed 110 psi earlier the assumption was that was with the compressor running. Is the ambient temperature still 60f? If so you are seriously overcharged. The low side should be at least static refrigerant pressur...
by bohica2xo
Mon May 18, 2020 9:10 am
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 896

Re: Motorhome R134 Problems

I am guessing the 1200 rpm is high idle on a diesel? What is cruising rpm? With 8lbs of 134a circulating, and the low side cycling between 25 & 30 psi - something is getting cold. The cool suction line at 28 psi, and the hot compressor discharge @ 110 psi point to significant heat transfer. Is t...

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