Search found 302 matches

by Al9
Sat Jun 26, 2021 7:17 am
Forum: Automotive Air Conditioning Forum
Topic: 2017 F150 AC problem.
Replies: 14
Views: 633

Re: 2017 F150 AC problem.

As far as i know that's a classic Seltec 10 piston fixed swash. TXV and evap temp probe are the only temperature controls. Clutch cuts off once evap gets cold enough and cuts back in once it's warmed up a bit. No fancy internal control/variable displacement stuff. My OEM Delphi variable comp had the...
by Al9
Sat Jun 26, 2021 3:39 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Grayish Powder Inside High Pressure Line
Replies: 25
Views: 1123

Re: Grayish Powder Inside High Pressure Line

By the way that's a scroll comp. No seals. Likely normal wear of a scroll, nothing to really worry about. Tim's suggestion of adding a little fresh oil (ask any decent shop for double end capped PAG 46) is spot on. The lubricity addpak of even the best OEM oils (Idemitsu DH-PS basically in that case...
by Al9
Sat Jun 26, 2021 2:32 am
Forum: Automotive Air Conditioning Forum
Topic: Low side normal /high side low stumped
Replies: 82
Views: 2378

Re: Low side normal /high side low stumped

So I should put the factory one back in because the different OT will cause the txv to function different? Honestly don't know, but i don't believe an O/T is able to interfere with a TXV since it can't modulate flow. Unless you get the OT so oversized that you end up starving the rear TXV, but that...
by Al9
Fri Jun 25, 2021 5:50 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Grayish Powder Inside High Pressure Line
Replies: 25
Views: 1123

Re: Grayish Powder Inside High Pressure Line

I'd flush everything and replace the oil charge (with DEC PAG) and the dryer to get the most of that wear away, the old oil will lose lubricity eventually anyway. You can get a second hand/aftermarket TXV and drill it/remove the metering pin assembly from within in order to flush with all piping on ...
by Al9
Fri Jun 25, 2021 5:22 am
Forum: Automotive Air Conditioning Forum
Topic: AC not cold and excessive moisture/water under the car
Replies: 6
Views: 385

Re: AC not cold and excessive moisture/water under the car

Though excessive condensation from the suction line rather than the condensate drain may possibly mean expansion device issues (too big OT or too open TXV)...
by Al9
Fri Jun 25, 2021 4:37 am
Forum: Automotive Air Conditioning Forum
Topic: Low side normal /high side low stumped
Replies: 82
Views: 2378

Re: Low side normal /high side low stumped

An incorrect OT having a larger orifice than that would tend to raise low-side pressures above the optimum range and result in higher duct temperatures. Slightly OT (as in Off Topic :lol: ). Pretty interesting. Even a smaller than normal one will raise duct temps, but due to a starved evap this tim...
by Al9
Fri Jun 25, 2021 3:35 am
Forum: Automotive Air Conditioning Forum
Topic: My new motorhome needs Air Con!!
Replies: 20
Views: 585

Re: My new motorhome needs Air Con!!

Not only everything said up to that point, forcing a comp to run with so little refrigerant within the system is a recipe for compressor seizure...
by Al9
Thu Jun 24, 2021 4:34 am
Forum: Automotive Air Conditioning Forum
Topic: Evacuating System Oil Content
Replies: 3
Views: 189

Re: Evacuating System Oil Content

That i know, PAG/Ester oils aren't air soluble, only refrigerant soluble. In addition, they will cling to anything metal, almost like magnets. Vacuum will mostly recover air and moisture, and any leftover refrigerant with them (very little amount, once recovery is accomplished), so i'd rather worry ...
by Al9
Thu Jun 24, 2021 4:25 am
Forum: Automotive Air Conditioning Forum
Topic: 2012 Dodge Grand Caravan AC issue driving me nuts.
Replies: 32
Views: 1113

Re: 2012 Dodge Grand Caravan AC issue driving me nuts.

You're supposed to recover any refrigerant, vacuum and then charge by weight. If you can't do that by yourself, you need to have a pro do that. Blindly adding refrigerant is going to lead you nowhere.
by Al9
Fri Jun 18, 2021 7:32 am
Forum: Automotive Air Conditioning Forum
Topic: Dual Evaporator Requirements
Replies: 15
Views: 840

Re: Dual Evaporator Requirements

Two orifice tubes would likely lead to serious pressure imbalance and charge migration issues in certain conditions (for example leaving only the front system operational, and turning the fan off on the rear one yet leaving it with a live, that is, refrigerant fed, evap) and basically end up in no c...