Search found 379 matches

by Dougflas
Sun Aug 16, 2020 10:03 am
Forum: Automotive Air Conditioning Forum
Topic: 1970 Oldsmobile AC Woes
Replies: 5
Views: 6146

Re: 1970 Oldsmobile AC Woes

Hook up the gauges and unplug the blower motor. The low side should drop to 26PSI. If not bad POA is most probable cause.
by Dougflas
Tue Aug 11, 2020 1:53 pm
Forum: Automotive Air Conditioning Forum
Topic: Pag Oil Question
Replies: 1
Views: 2084

Re: Pag Oil Question

I would add 2 oz in each.
by Dougflas
Tue Aug 11, 2020 1:52 pm
Forum: Automotive Air Conditioning Forum
Topic: O Ring Dilemma
Replies: 3
Views: 3463

Re: O Ring Dilemma

You could also purchase a vehicle specific kit with all o-rings. Tim should have them.
by Dougflas
Mon Aug 10, 2020 4:16 pm
Forum: Automotive Air Conditioning Forum
Topic: Ac cold at idle, gets warm
Replies: 3
Views: 4301

Re: Ac cold at idle, gets warm

Fords had that problem of either low charge or bad cycling switches. What happens (low charge) is the refrigerant system will quick cycle when going down the highway. At idle the temps will be fine. The first thing to do when you have most AC problems is to verify the correct charge.. and thus elimi...
by Dougflas
Mon Aug 10, 2020 6:18 am
Forum: Automotive Air Conditioning Forum
Topic: Ac cold at idle, gets warm
Replies: 3
Views: 4301

Re: Ac cold at idle, gets warm

Did you recover and recharge to factory specs? Sounds like a refrigerant charge problem.
by Dougflas
Fri Aug 07, 2020 5:44 am
Forum: Automotive Air Conditioning Forum
Topic: Weak Compressors, or bad orifice tube?
Replies: 19
Views: 18167

Re: Weak Compressors, or bad orifice tube?

VOV's work better for low speed as in a mail delivery vehicle. For regular operations, just use a regular orfice tube. Superheat is not used in MVAC due to the ever changing conditions.
by Dougflas
Mon Aug 03, 2020 11:10 pm
Forum: Automotive Air Conditioning Forum
Topic: Forgot more than I know
Replies: 32
Views: 27842

Re: Forgot more than I know

Also make sure the fans are turning in the correct direction.
by Dougflas
Mon Aug 03, 2020 3:04 pm
Forum: Automotive Air Conditioning Forum
Topic: Forgot more than I know
Replies: 32
Views: 27842

Re: Forgot more than I know

airflow across condenser
by Dougflas
Mon Aug 03, 2020 7:21 am
Forum: Automotive Air Conditioning Forum
Topic: Weak Compressors, or bad orifice tube?
Replies: 19
Views: 18167

Re: Weak Compressors, or bad orifice tube?

You can not get an accurate temp using an infared thermometer due to emissary problems. Depending upon the reflectance of the metal the reading will vary. That is the reason why it is suggested to "shoot" an area that is black. If you shoot an area that is shinny, both in and out of the ac...
by Dougflas
Mon Aug 03, 2020 1:24 am
Forum: Automotive Air Conditioning Forum
Topic: Weak Compressors, or bad orifice tube?
Replies: 19
Views: 18167

Re: Weak Compressors, or bad orifice tube?

bohica2xo wrote:A cold accumulator with 74f discharge air indicates some blend air entry.
I agree 100%. Block off or by-pass the heater core.