Search found 642 matches

by bohica2xo
Wed Sep 11, 2019 2:49 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 752

Re: Pressures Equalize Instantly

Ice - long time no see.

Thanks for the suggestion.

.
by bohica2xo
Wed Sep 11, 2019 8:11 am
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 752

Re: Pressures Equalize Instantly

Recover the system & weigh the remaining charge. This will tell you how big the leak is.

Then add dye to the system & charge with the correct weight. If it quits working again in 2 weeks, a UV light source will show you the leak.
by bohica2xo
Tue Sep 10, 2019 10:39 am
Forum: Automotive Air Conditioning Forum
Topic: '99 F250 Super Duty- immediate low side drop
Replies: 22
Views: 1047

Re: '99 F250 Super Duty- immediate low side drop

Heater valves fail.

Also check the evaporator for crud. A plugged up air side will give poor performance, and considerable cooling of the suction line.

A 10 year old pickup truck may have an evaporator full of leaves / dog hair / mouse nests...
by bohica2xo
Tue Sep 10, 2019 10:35 am
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 752

Re: Pressures Equalize Instantly

It would have a static pressure of 100 psi with a single ounce of refrigerant in it. That is the nature of refrigerant gasses. You have a leak. It crossed below the critical charge weight & quit cooling. But keep throwing cheap online auction parts at it and you may accidentally fix the leak alo...
by bohica2xo
Mon Sep 09, 2019 6:35 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 752

Re: Pressures Equalize Instantly

You have a leak. It is undercharged, just a few days after service.
by bohica2xo
Wed Sep 04, 2019 9:15 am
Forum: Automotive Air Conditioning Forum
Topic: Low side pressure drops off.
Replies: 2
Views: 105

Re: Low side pressure drops off.

The system is undercharged and is short cycling. You can't evaluate a CCOT system with half of the charge installed. If the high side pressure seems high it is probably a condenser or airflow problem. Too much oil in the system will also raise high side pressures and hurt performance. The fact that ...
by bohica2xo
Wed Sep 04, 2019 9:07 am
Forum: Automotive Air Conditioning Forum
Topic: '99 F250 Super Duty- immediate low side drop
Replies: 22
Views: 1047

Re: '99 F250 Super Duty- immediate low side drop

You never stated the test conditions - Ambient air temperature / Cabin fan speed / vent temperature / engine speed / High aide pressure / low side pressure. If you are above 80f ambient I would be inclined to recover it & check the orifice tube for debris. That is assuming that the evaporator ha...
by bohica2xo
Mon Aug 26, 2019 9:24 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: 1000 MICRONS
Replies: 3
Views: 386

Re: 1000 MICRONS

It is normal for some outgassing to raise the micron level at first, so pull it back down below 1000 & try again.

Check your service valve hardware, hoses & manifold set for leaks as well.

All of this assumes you corrected the suction hose leak you mentioned.
by bohica2xo
Fri Aug 23, 2019 8:15 am
Forum: Automotive Air Conditioning Forum
Topic: 2001 gmc yukon 1500
Replies: 4
Views: 141

Re: 2001 gmc yukon 1500

Yep. Spray water on new condenser, pressure drops. Either defective partially blocked condenser or lack of airflow. Since all of the testing is being done in the work bay...

GM Tech does have a point about finding two orifice tubes. Good idea to check for that as well.
by bohica2xo
Thu Aug 22, 2019 10:26 pm
Forum: Automotive Air Conditioning Forum
Topic: Best Compressor For R12 In Diesel Pusher
Replies: 19
Views: 4225

Re: Best Compressor For R12 In Diesel Pusher

The coefficient of performance or COP of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required

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