Search found 122 matches

by DetroitAC
Tue Oct 05, 2021 8:10 pm
Forum: Automotive Air Conditioning Forum
Topic: 2011 Hyundai Tucson a/c not working
Replies: 13
Views: 763

Re: 2011 Hyundai Tucson a/c not working

Your Hyundai uses a variable displacement compressor, it will be at it's minimum angle if turning it over by hand, just barely pumping. The best scenario is these guys who looked at your car might be out of their depth, worst case they are trying to make their boat payment with unnecessary repairs. ...
by DetroitAC
Sun Oct 03, 2021 11:56 am
Forum: Automotive Air Conditioning Forum
Topic: 2007 Yukon Denali – no air flow – freezing but not low on charge?
Replies: 23
Views: 979

Re: 2007 Yukon Denali – no air flow – freezing but not low on charge?

I use superheat and subcool every day :mrgreen: Your low side pressure switch is bad, there is no automotive system that would let a compressor run at 5 psig suction. Many vehicles have a Schrader valve core in the adapter to the low side pipe so you can change the switch without pulling the charge....
by DetroitAC
Sat Oct 02, 2021 5:50 pm
Forum: Automotive Air Conditioning Forum
Topic: 2007 Yukon Denali – no air flow – freezing but not low on charge?
Replies: 23
Views: 979

Re: 2007 Yukon Denali – no air flow – freezing but not low on charge?

Sounds like two separate problems to me. Slow leak and freezing up the front evap. I don't think the reading on the gauges will help that much, also couldn't hurt. But you are going to find very low suction pressures while it is in the process of freezing up. I think we know that already. I suspect ...
by DetroitAC
Sat Oct 02, 2021 5:20 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 VW Jetta - Mystery Refrigerant Leak
Replies: 5
Views: 266

Re: 2005 VW Jetta - Mystery Refrigerant Leak

Your description reads like an evaporator leak to me, huge smell inside the car, PAG oil is really stinky. Get under the car, the drain tube can be hard to find, but when you do there will probably be dye on it. I'm not so sure sniffers are superior and the only way, I have a good one, but different...
by DetroitAC
Fri Sep 24, 2021 5:36 am
Forum: Automotive Air Conditioning Forum
Topic: Sanden AC Compressors vs OEM Split Housing Style
Replies: 1
Views: 213

Re: Sanden AC Compressors vs OEM Split Housing Style

SD7H15 is a very solid compressor, yes it's very durable because of how it's designed, it is a wobble plate which is more tolerant to lubrication issues than a swashplate compressor like HT6. SD7H15 is used for the majority of the heavy truck market where downtime costs serious money. This is why an...
by DetroitAC
Mon Sep 20, 2021 3:08 pm
Forum: Automotive Air Conditioning Forum
Topic: My turn, need the wizards
Replies: 35
Views: 1694

Re: My turn, need the wizards

As a reality check, I just checked the pressures on 2 vintage vehicles we did, a 1931 and a 1947. Both have the EXACT same components we have on this '59 Cadillac Car 1 30/200 car 2 30/230 did not measure vent temp but ice cold as usual, prolly 40° Is the evaporator airflow the same for all these 3...
by DetroitAC
Sun Sep 19, 2021 5:43 am
Forum: Automotive Air Conditioning Forum
Topic: My turn, need the wizards
Replies: 35
Views: 1694

Re: My turn, need the wizards

Oil return isn't a problem at abnormally low suction pressures. My guess is you have a lot of superheat, since you've described the suction line as cold and not frosted. As suction pressure goes lower, the gas density decreases, but the volume flow stays pretty much the same since a compressor is a ...
by DetroitAC
Sat Sep 18, 2021 3:57 pm
Forum: Automotive Air Conditioning Forum
Topic: My turn, need the wizards
Replies: 35
Views: 1694

Re: My turn, need the wizards

The more I read this, the more it seems like there isn't a problem. 4 vents are very cold, low side pressure is too low, the compressor should cycle since it has more pumping capacity than the evap can handle. How are you setup to cycle the clutch, what controls? Why isn't it cycling instead of lett...
by DetroitAC
Sat Sep 18, 2021 6:50 am
Forum: Automotive Air Conditioning Forum
Topic: My turn, need the wizards
Replies: 35
Views: 1694

Re: My turn, need the wizards

Vent Temps? 3 of them ambient and 1 slightly cooler? I'm thinking defective evap short circuiting liquid right to the outlet, I've encountered them a few times.
by DetroitAC
Thu Sep 16, 2021 11:50 am
Forum: Automotive Air Conditioning Forum
Topic: Changing Hose Sizes?
Replies: 11
Views: 768

Re: Changing Hose Sizes?

Got it, there is nothing wrong with using aluminum pipe as long as it's well supported and can handle the mechanical forces. Aluminum pipe is preferred by OEMs because it's cheap and durable, hoses are only used where necessary to accomodate movement (like engine rock) or assembly issues like where ...