Search found 356 matches

by Dougflas
Fri May 06, 2016 10:47 am
Forum: Automotive Air Conditioning Forum
Topic: 71 Chevrolet C/10-Pressures good / air only cool?
Replies: 18
Views: 16723

Re: 71 Chevrolet C/10-Pressures good / air only cool?

Also make sure the drier is connected in the correct flow position.
by Dougflas
Thu May 05, 2016 11:14 am
Forum: Automotive Air Conditioning Forum
Topic: 71 Chevrolet C/10-Pressures good / air only cool?
Replies: 18
Views: 16723

Re: 71 Chevrolet C/10-Pressures good / air only cool?

If you were low on refrigerant, you'd see flashing (bubbles) in the sight glass. To measure the line temps, use of a gun type thermometer is not accurate. The tubing has a reflectivity that will throw the temps off. I use a clamp on type thermometer (you can use a K-type that converts to a voltage o...
by Dougflas
Thu May 05, 2016 5:23 am
Forum: Automotive Air Conditioning Forum
Topic: 71 Chevrolet C/10-Pressures good / air only cool?
Replies: 18
Views: 16723

Re: 71 Chevrolet C/10-Pressures good / air only cool?

Are you using R 12? Sight glass clear? Disconnect the blower motor and the low side should be at 28 PSi. I used to be happy if those older systems were at 48*. You can check the TXV by removing the sensing bulb, holding the bulb in your hand for a minute or two, see if the readings change. Then plac...
by Dougflas
Thu May 05, 2016 5:15 am
Forum: Automotive Air Conditioning Forum
Topic: 1971 Chevy pickup
Replies: 5
Views: 5522

Re: 1971 Chevy pickup

Have to know which refrigerant you are using. Maker of unit? Is there a sight glass on the drier?
by Dougflas
Wed May 04, 2016 11:27 am
Forum: Automotive Air Conditioning Forum
Topic: Custom A/C system diagnostic
Replies: 13
Views: 13822

Re: Custom A/C system diagnostic

Your input and output of the evap should be about the same temp. This will tell you the evap is fully flooded. The output can be a few degrees colder. Gm used to state that to do a partial charge to fill system until both of these lines are the same temp and then add a few more oz of refrigerant.
by Dougflas
Mon Apr 18, 2016 6:12 pm
Forum: Automotive Air Conditioning Forum
Topic: New Board is alive
Replies: 5
Views: 7181

New Board is alive

I guess there is some learning to do. :lol:

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