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by Al9
Fri Aug 28, 2020 4:51 am
Forum: Automotive Air Conditioning Forum
Topic: Potentially useful info about 4seasons 68660 and similar compressors
Replies: 0
Views: 535

Potentially useful info about 4seasons 68660 and similar compressors

Eventually found out that the replacement compressor that was fitted to my car is in fact a variation of the 4seasons 68660 Calsonic CSV613 type replacement compressor (different head and housing, same internals and clutch assembly). Though it's marketed by a different local company. If you carefull...
by Al9
Fri Aug 28, 2020 1:32 am
Forum: Automotive Air Conditioning Forum
Topic: Low side high, high side low?
Replies: 7
Views: 373

Re: Low side high, high side low?

Again since this is a variable compressor, pressures aren't really of interest. Refrigerant charge weight is, on the other hand. Anyway a lower than normal high side definitely means either that the TXV is stuck open or the compressor isn't running at full stroke. Would it be worth evacuating, check...
by Al9
Thu Aug 27, 2020 2:56 pm
Forum: Automotive Air Conditioning Forum
Topic: Low side high, high side low?
Replies: 7
Views: 373

Re: Low side high, high side low?

PeterW76 wrote:Also, the compressor stays engaged...no cycling on and off.

Entirely normal behaviour since it's a variable compressor. The clutch only cycles off and on when high side gets too high, rpm drops too low and the engine is about to stall, WOT.
by Al9
Thu Aug 27, 2020 1:53 pm
Forum: Automotive Air Conditioning Forum
Topic: Low side high, high side low?
Replies: 7
Views: 373

Re: Low side high, high side low?

But then I read somewhere that if the expansion valve is stuck open then liquid refrigerant would do directly to the evaporator and cause freezing. In fact it's the other way around. A stuck open TXV prevents the evaporator from freezing up. A nearly jammed closed one can freeze it up instead (but ...
by Al9
Wed Aug 26, 2020 1:38 pm
Forum: Automotive Air Conditioning Forum
Topic: 1996 GM Compressor Diagnosis
Replies: 4
Views: 320

Re: 1996 GM Compressor Diagnosis

Sanden is the way to go. DA6/H6 compressors are simply an awful design.
by Al9
Wed Aug 26, 2020 7:41 am
Forum: Automotive Air Conditioning Forum
Topic: 2019 Chevy Sonic is blowing warm air and is making some type of rinsing noise.
Replies: 5
Views: 313

Re: 2019 Chevy Sonic is blowing warm air and is making some type of rinsing noise.

Exactly that. And there's a leak that needs to be found and fixed beforehands, or that refrigerant is going to get somewhere over the rainbow soon. And any auto AC compressor takes a real beating whenever it's ran like that.

One year old tells me that it's still on warranty.
by Al9
Wed Aug 26, 2020 12:54 am
Forum: Automotive Air Conditioning Forum
Topic: 2019 Chevy Sonic is blowing warm air and is making some type of rinsing noise.
Replies: 5
Views: 313

Re: 2019 Chevy Sonic is blowing warm air and is making some type of rinsing noise.

That's the classic noise of the negation of air conditioning itself - the expansion device is being presented with 100% vapor refrigerant, so no expansion is taking place within the evaporator at all, and hence no cooling (it's the liquid->vapor passage that takes the heat away from the air). I have...
by Al9
Tue Aug 25, 2020 1:43 am
Forum: Automotive Air Conditioning Forum
Topic: Oil Balance Question
Replies: 9
Views: 582

Re: Oil Balance Question

You're welcome. Glad to know everything's fine. About the 49F vent temperature, if you have the Mitsu scroll unfortunately that's a little quirk of scroll compressors. You're likely at idle or low rpm and they're not that efficient at low rpms (and high evaporator superheats, a result of high heat l...
by Al9
Sun Aug 23, 2020 12:19 pm
Forum: Automotive Air Conditioning Forum
Topic: Help me diagnose my AC
Replies: 28
Views: 1249

Re: Help me diagnose my AC

Nothing came out of the other parts PAG oil is polar, hence it sticks to anything metal. Generally speaking if the part has a large internal surface area (such is the case of a condenser, an evaporator or the desiccant media of an accumulator/receiver dryer), then the part will retain a lot of it u...
by Al9
Sun Aug 23, 2020 1:43 am
Forum: Automotive Air Conditioning Forum
Topic: Weak Compressors, or bad orifice tube?
Replies: 24
Views: 3027

Re: Weak Compressors, or bad orifice tube?

Excellent, so now you can see how an oversized expansion device (whether TXV, OT or VOV) can mess cooling up really bad. Now some complaint to whoever marketed the replacement liquid line equipped with the green o-tube is in order. I'd ask them about the correct fixed orifice tube size or VOV part n...

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