Search found 896 matches

by JohnHere
Thu Sep 29, 2022 7:43 pm
Forum: Automotive Air Conditioning Forum
Topic: A/C Clutch Will not Engage 2010 Mustang 4.0
Replies: 1
Views: 16

Re: A/C Clutch Will not Engage 2010 Mustang 4.0

I'm guessing that it's low on refrigerant, which would prevent the compressor from engaging. Have you connected a Manifold Gauge Set to check the static pressures?
by JohnHere
Wed Sep 28, 2022 2:10 pm
Forum: Automotive Air Conditioning Forum
Topic: 2003 GMC yukon XL / Chevy Suburban
Replies: 8
Views: 86

Re: 2003 GMC yukon XL / Chevy Suburban

The place to start would be to leak-check the system, as you suggest, while the system is still pressurized. Look for oily spots and/or traces of green fluorescent dye on all visible A/C components and connections. Also look for dye in the condensate that drains from the evaporators (under the vehic...
by JohnHere
Wed Sep 28, 2022 12:55 pm
Forum: Automotive Air Conditioning Forum
Topic: 2003 GMC yukon XL / Chevy Suburban
Replies: 8
Views: 86

Re: 2003 GMC yukon XL / Chevy Suburban

An ambient temperature of ~65°F is somewhat mild for testing system performance. Around 80°F or higher would be better. Regardless, based on your pressure readings, I agree that the system seems to have a leak someplace even though it's the rear A/C that blows cold. Do you happen to know whether the...
by JohnHere
Wed Sep 28, 2022 12:02 pm
Forum: Automotive Flushing Forum
Topic: 88 Toyo Pickup - rebuild ac system and flush questions
Replies: 7
Views: 591

Re: 88 Toyo Pickup - rebuild ac system and flush questions

I want to follow up on the process and volume of getting PAG-46 oil into the system. I read the Toyota R12 to R134a conversion document http://tms.cleanautoalliance.org/documents/ac002t98.pdf and I think the oil volume described (100cc) assumes the system is not flushed (the process on Pages 5-6 do...
by JohnHere
Sun Sep 25, 2022 3:09 pm
Forum: Automotive Air Conditioning Forum
Topic: New Parts But Can't Pull a Good Vacuum
Replies: 11
Views: 268

Re: New Parts But Can't Pull a Good Vacuum

My guess is that the ambient temperature was between 75 and 80 degrees. Still, I'd like to see the low side a bit lower than that. Keep an eye on it. If the evaporator ices up, it might be a little undercharged.
by JohnHere
Sat Sep 24, 2022 4:00 pm
Forum: Automotive Air Conditioning Forum
Topic: New Parts But Can't Pull a Good Vacuum
Replies: 11
Views: 268

Re: New Parts But Can't Pull a Good Vacuum

OP, be aware that those small cans of refrigerant might contain fewer than 12 ounces. The only way to know for sure is to weigh-in each can (or partial can) to arrive at the total amount for your system.
by JohnHere
Thu Sep 22, 2022 7:53 pm
Forum: Automotive Air Conditioning Forum
Topic: New Parts But Can't Pull a Good Vacuum
Replies: 11
Views: 268

Re: New Parts But Can't Pull a Good Vacuum

One-quarter cup equals approximately 2 fluid ounces. So, yes, put 2 fluid ounces of the proper weight PAG oil back into the condenser.That's the amount I was going to suggest anyway.
by JohnHere
Thu Sep 22, 2022 5:59 pm
Forum: Automotive Air Conditioning Forum
Topic: The ac in my 07 Hyundai Santa Fe
Replies: 2
Views: 67

Re: The ac in my 07 Hyundai Santa Fe

Several questions here, but the first few are:
How did you evacuate it?
How did you charge it?
Did you check for re-heating?
by JohnHere
Sun Sep 18, 2022 5:05 pm
Forum: Automotive Air Conditioning Forum
Topic: Can't add a full charge to 2003 Ford E150
Replies: 9
Views: 618

Re: Can't add a full charge to 2003 Ford E150

Great news...thanks for updating us.
by JohnHere
Sat Sep 17, 2022 8:43 am
Forum: Automotive Air Conditioning Forum
Topic: Issue with A/C at anything over idle
Replies: 3
Views: 171

Re: Issue with A/C at anything over idle

Both the high and lower pressure switches have been replaced and the refrigerant load is per spec as he had it evacuated and refilled to factory levels. Another thought: Depending on when it was evacuated and re-charged, it's possible that the system has a leak and the refrigerant amount is no long...