Search found 115 matches

by bohica2xo
Thu May 25, 2017 7:45 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough
Replies: 9
Views: 135

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

Your refrigerant loop is working, and moving heat. The elevated high side is the reduced airflow over the condenser - the worn fan clutch. Engine cooling systems have a lot of reserve. The A/C system suffers first, well before overheating the coolant. The diverter door random operation suggests the ...
by bohica2xo
Mon May 22, 2017 9:39 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Suburban Rear Evap Help
Replies: 2
Views: 31

Re: 99 Suburban Rear Evap Help

Jack it up & look at the lines to the rear evaporator with your UV light.
by bohica2xo
Sun May 21, 2017 5:01 pm
Forum: Automotive Air Conditioning Forum
Topic: 2006 PT Cruiser diagnostic
Replies: 3
Views: 40

Re: 2006 PT Cruiser diagnostic

At least one of the fans should be running with the A/C compressor. Some systems run both fans at lower speed.

With no airflow on the condenser until you hit 400+ psi, you will have odd results.

Find the electrical issue keeping you from having fans on with the compressor running.
by bohica2xo
Sun May 21, 2017 4:54 pm
Forum: Automotive Air Conditioning Forum
Topic: From ND8 to PAO 68 oil ?
Replies: 1
Views: 33

Re: From ND8 to PAO 68 oil ?

I have never seen a PAO that was miscible with 134a. PAO is ok with R12 & HC's

134a should use PAG, or if you want a substitute POE. DEC PAG oils are not hygroscopic, so there is no reason to fear them.
by bohica2xo
Sun May 21, 2017 4:42 pm
Forum: Automotive Air Conditioning Forum
Topic: 70 GMC, 134 retrofit problem
Replies: 4
Views: 46

Re: 70 GMC, 134 retrofit problem

Make sure the expansion valve sensor bulb is making good contact with the suction line at the evaporator - and cover it with something. Presstite tape is required for final install, but you can wrap a shop rag around it several times & secure it in place for testing. An exposed sensing bulb will...
by bohica2xo
Wed May 17, 2017 3:28 pm
Forum: Automotive Air Conditioning Forum
Topic: Help trying to figure out this AC problem
Replies: 2
Views: 83

Re: Going to die this summer....

Adjust the compressor clutch gap.

Just a case of removing the driven plate & removing a shim or two.
by bohica2xo
Wed May 17, 2017 11:56 am
Forum: Automotive Air Conditioning Forum
Topic: R134a pressures too high
Replies: 5
Views: 115

Re: R134a pressures too high

Air powered vacuum pump?

Oil charge when parts were replaced?
by bohica2xo
Tue May 16, 2017 10:51 am
Forum: Automotive Air Conditioning Forum
Topic: R134a pressures too high
Replies: 5
Views: 115

Re: R134a pressures too high

Tell us a little more about the New Condenser.

Is it a parallel flow unit? Tube & fin? OEM replacement?

.
by bohica2xo
Tue May 16, 2017 10:49 am
Forum: Automotive Air Conditioning Forum
Topic: Can I use an argon gas cylinder for nitrogen?
Replies: 2
Views: 50

Re: Can I use an argon gas cylinder for nitrogen?

Nitrogen and Argon cylinders have the same valve. The industry standard for Inert Gasses is CGA 580. If you have a virgin cylinder they can fill it with nitrogen easily. If it contains Argon now, they will want to "clean" it for gas purity. FYI, you can use Argon to test a system - so if y...
by bohica2xo
Mon May 15, 2017 11:20 pm
Forum: Automotive Air Conditioning Forum
Topic: 2005 Navigator - Replaced nearly entire A/C system, still won't blow cold enough
Replies: 9
Views: 135

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

110k miles. Probably time for a fan clutch. I see lots of idle testing. Do a full load test. Doors open, Cabin fans on highest speed. Raise engine rpm above 2,000 rpm. Run the engine at that speed for at least 90 seconds, then record the pressures, the vent temp & ambient temp while the engine i...

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