Search found 18 matches

by AGrayson84
Mon Jul 17, 2017 8:03 pm
Forum: Automotive Air Conditioning Forum
Topic: Evaporator temps around 70 degrees, vent temps only 45 degrees at best
Replies: 9
Views: 1006

Re: Evaporator temps around 70 degrees, vent temps only 45 degrees at best

Does anyone here understand super-heat and sub-cooling? I've been talking to my buddy who does residential and commercial A/C work for a living. He's been doing it for over a decade. He admits to not knowing about automotive A/C systems, but he has been dealing with R134A for quite some time. He use...
by AGrayson84
Mon Jul 17, 2017 7:50 pm
Forum: Automotive Air Conditioning Forum
Topic: Evaporator temps around 70 degrees, vent temps only 45 degrees at best
Replies: 9
Views: 1006

Re: Evaporator temps around 70 degrees, vent temps only 45 degrees at best

So late last week, we had our first really hot day. It was about 98/98 degrees outside. The car was not in the shade, sitting in a parking lot with my Covercraft windshield visor and tinted windows, so the interior was definitely hot still, but not exactly baking. I started up the car with the front...
by AGrayson84
Mon Jul 17, 2017 7:29 pm
Forum: Automotive Air Conditioning Forum
Topic: Evaporator temps around 70 degrees, vent temps only 45 degrees at best
Replies: 9
Views: 1006

Re: Evaporator temps around 70 degrees, vent temps only 45 degrees at best

Hi everyone, thanks for your continued help on this. I've been tied up with a bunch of other things lately and just recently have gotten back into troubleshooting this issue. I know my posts are very lengthy, and here comes another one, but it hopefully includes all the important details you all are...
by AGrayson84
Wed Jun 28, 2017 5:01 pm
Forum: Automotive Air Conditioning Forum
Topic: Evaporator temps around 70 degrees, vent temps only 45 degrees at best
Replies: 9
Views: 1006

Re: Evaporator temps around 70 degrees, vent temps only 45 degrees at best

How does 62 degrees sound on a 93 degree day, in recirc mode?? Haha. That 45 degrees is also only if I'm barreling down the highway for 15+ minutes. Otherwise, if I'm sitting in traffic, that same day I see 45 blasting down the highway, I only see 54 or so sitting still. And 60 degree days... I've s...
by AGrayson84
Sat Jun 24, 2017 12:12 pm
Forum: Automotive Air Conditioning Forum
Topic: Evaporator temps around 70 degrees, vent temps only 45 degrees at best
Replies: 9
Views: 1006

Evaporator temps around 70 degrees, vent temps only 45 degrees at best

Hi everyone, I had another thread on here recently, and after replacing all A/C components this weekend, I have no improvements in outlet temp. Here is the history: 2006 Lincoln Navigator w/rear (aux) A/C. Bought it in April 2016, with 110k on the odometer. Seemed to be taken care of pretty well. Su...
by AGrayson84
Fri Jun 16, 2017 2:21 pm
Forum: Automotive Air Conditioning Forum
Topic: How to properly drain a compressor?
Replies: 4
Views: 617

How to properly drain a compressor?

Hi everyone, I have a compressor that is only a few months old, but I decided to tear down the entire A/C system and start from scratch with filling the PAG oil and refrigerant (I feel there's a chance I added a little more than the required 14 oz when filling the new compressor late last year when ...
by AGrayson84
Tue Jun 06, 2017 6:21 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough
Replies: 21
Views: 2067

Re: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough

I guess the thing to keep in mind is that it will only hit 45 degrees sometimes . Some days it'll be in the 70's outside, and I'll be cruising down the highway with the A/C on full blast for 30+ minutes and still only see 48 degrees or so. And the amount of time it takes to get to 45 degrees, on the...
by AGrayson84
Mon Jun 05, 2017 7:28 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough
Replies: 21
Views: 2067

Re: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough

Those that read my prior posts within this thread might recall that when I did a vacuum check, followed by a pressure check (with nitrogen), the system wasn't holding. I actually did several more vacuum checks after the first pressure check, and could see a decrease in vacuum after just several minu...
by AGrayson84
Mon Jun 05, 2017 7:13 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough
Replies: 21
Views: 2067

Re: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough

You will hear the difference on the first cold start after install. Consider the P/T curve. With 250 psi, the liquid is 147f. With 200 psi, the liquid is 131f Every single thing in the system has an effect. A little too much oil, a slight undercharge because of poor condenser performance, etc. Many...

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