Search found 73 matches

by DetroitAC
Tue Jul 27, 2021 10:16 am
Forum: Automotive Air Conditioning Forum
Topic: How long does Nitrogen Gas last
Replies: 3
Views: 49

Re: How long does Nitrogen Gas last

Back of the envelope calculations:

You can pressure test a front only vehicle with 150 psig nitrogen 55 times with a 10 Liter bottle which is 2500 psig when full. Leak testing is never a one and done kind of deal, might be pressurizing 10 times until you've got it tight
by DetroitAC
Mon Jul 26, 2021 5:01 pm
Forum: Automotive Air Conditioning Forum
Topic: What happens when capacity of system is exceeded?
Replies: 13
Views: 133

Re: What happens when capacity of system is exceeded?

OK, I'll just echo what everyone else is saying, but I'll put them in the order I think they **usually** go in, some vehicles will be different, but this is a generalization, I guess. I'm assuming that for every change made, Evap out Superheat is set to an optimum, Condenser out subcooling is set to...
by DetroitAC
Mon Jul 26, 2021 12:24 pm
Forum: Automotive Air Conditioning Forum
Topic: 2006 530i bmw
Replies: 20
Views: 254

Re: 2006 530i bmw

I think this is probably a clutchless variable. It's not clear from your description what is a cause and what is an effect. You say the cooling module fan isn't coming on, but AC also not working? Unless the compressor is pumping, there is no need for cooling module fan operation. In the morning whe...
by DetroitAC
Mon Jul 26, 2021 8:59 am
Forum: Automotive Air Conditioning Forum
Topic: Whistle
Replies: 1
Views: 30

Re: Whistle

What trim level Fit do you have? Is it conniption or screaming or tantrum? That's my wife's joke, I re-used it with her permission. Might be a slipping clutch, if so the pulley and clutch disc will get really hot. I don't know much about that car, would you be able to check the air gap distance betw...
by DetroitAC
Fri Jul 23, 2021 1:09 pm
Forum: Automotive Air Conditioning Forum
Topic: Brand new AC compressor “breathing” noise
Replies: 5
Views: 98

Re: Brand new AC compressor “breathing” noise

Sounds like TVX hiss, some evaporator do it worse than others, being undercharged makes it worse. could also be the evap pipes are making hard contact with the HVAC unit case Edit: Was it an aftermarket TXV? You might switch back to an OEM, or if the noise doesn't bother you, don't do anything, it w...
by DetroitAC
Wed Jul 21, 2021 7:06 pm
Forum: Automotive Air Conditioning Forum
Topic: Unable to pull deep vacuum
Replies: 11
Views: 318

Re: Unable to pull deep vacuum

Yes, I meant that tool, change the core with system under pressure, had no idea they really exist for auto.

I have an Appion recovery unit, G5 twin, not super impressed...
by DetroitAC
Wed Jul 21, 2021 3:28 pm
Forum: Automotive Air Conditioning Forum
Topic: Unable to pull deep vacuum
Replies: 11
Views: 318

Re: Unable to pull deep vacuum

I've never seen a tool like that for automotive service ports, I heard Bigfoot has one, but loaned it to DB Cooper. I have a few different kinds for commercial 1/4 ports, my opinion they are not necessary for automotive. Schrader valves are bigger and interior volume is tiny.
by DetroitAC
Wed Jul 21, 2021 7:42 am
Forum: Automotive Air Conditioning Forum
Topic: Underwhelming cooling performance after complete A/C restoration
Replies: 7
Views: 170

Re: Underwhelming cooling performance after complete A/C restoration

At these conditions what is the temperature of the suction line (evap out going to compressor)?
by DetroitAC
Tue Jul 20, 2021 6:47 pm
Forum: Automotive Air Conditioning Forum
Topic: Question about troubleshooting clogged condensor.
Replies: 11
Views: 170

Re: Question about troubleshooting clogged condensor.

Screen and dessicant bag are serviceable parts, and very cheap, the screen can actually just be cleaned, but might as well replace it. I don't know how often they are replaced, since you are all the way into tearing this vehicle apart, the entire condenser can be replaced with almost the same amount...
by DetroitAC
Tue Jul 20, 2021 4:25 pm
Forum: Automotive Air Conditioning Forum
Topic: Question about troubleshooting clogged condensor.
Replies: 11
Views: 170

Re: Question about troubleshooting clogged condensor.

I think you've diagnosed it correctly ThisOldBob, restriction at the exit of the condenser, refrigerant flashing there, likely the strainer basket inside the integrated receiver drier (big vertical can on the side of the condenser) Sounds like you have high superheat coming out of the evaporator, no...