Search found 303 matches

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...
by Al9
Fri Jun 18, 2021 3:16 am
Forum: Automotive Air Conditioning Forum
Topic: Is my compressor dead? Or is something else going on?
Replies: 3
Views: 240

Re: Is my compressor dead? Or is something else going on?

More than outright bad compressor or no charge, to me it sounds like a faulty mechanical control valve (that cylindrical shaped screw equipped thing protruding from the back of the compressor and held in place by a circlip) and a failure of this part will indeed prevent the VS16 compressor from actu...
by Al9
Thu Jun 17, 2021 3:41 am
Forum: Automotive Air Conditioning Forum
Topic: AC Compressor Kick in only once.
Replies: 5
Views: 247

Re: AC Compressor Kick in only once.

DKV14 rotary vane comp, seems like the thermal protection switch located upon the comp housing is either failing and kicking in when not necessary, or is actually doing its job and kicking in once the comp gets too hot (and the comp is getting too hot for some reason or another; undercharge, leftove...
by Al9
Tue Jun 15, 2021 7:12 am
Forum: Automotive Air Conditioning Forum
Topic: TXV Temp Sensor Clamped or Taped Only to Evap?
Replies: 9
Views: 416

Re: TXV Temp Sensor Clamped or Taped Only to Evap?

Leaving the sensing means exposed to the hot engine bay will make the TXV "hunt" in certain circumstances as the control charge cyclically migrates between a cold region and a hot region. I've seen a Denso patent where it seems that their "sensing tube in suction port" style bloc...
by Al9
Mon Jun 14, 2021 7:06 am
Forum: Automotive Air Conditioning Forum
Topic: Valve cores
Replies: 7
Views: 404

Re: Valve cores

Exactly that.
by Al9
Sun Jun 13, 2021 2:27 am
Forum: Automotive Air Conditioning Forum
Topic: Four Seasons Deslugger
Replies: 4
Views: 296

Re: Four Seasons Deslugger

I know a lot about small Jap cars and they like to use small displacement engines, fixed displacement (vane, piston, scroll) low mounted comps and Denso TXVs a lot for some reason. Slugging is never an issue there, otherwise you'd find these poor little things stalling all the time on the road. Noti...
by Al9
Sat Jun 12, 2021 2:51 am
Forum: Automotive Air Conditioning Forum
Topic: Valve cores
Replies: 7
Views: 404

Re: Valve cores

Once had my variable displacement comp stop going into stroke (cool air only while driving basically) in hot Summer weather about 2 weeks after correcting some minor leaks and RRR recharging by weight. Clutch coil thermal fuse then burned out and had to take it to shop for clutch coil R&R. Half ...
by Al9
Wed Jun 09, 2021 1:59 am
Forum: Automotive Air Conditioning Forum
Topic: No oil in the condenser
Replies: 15
Views: 636

Re: No oil in the condenser

Is it possible to flush the AC system effectively (excluding metal debris, of course) by removing the compressor and connecting to the lines where the compressor was, without removing other individual components? No. The drier has to be removed and bypassed (it's a filter), and the TXV will close o...
by Al9
Tue Jun 08, 2021 5:22 am
Forum: Automotive Air Conditioning Forum
Topic: No oil in the condenser
Replies: 15
Views: 636

Re: No oil in the condenser

Condensers, evaporators, driers, accumulators and compressors can store as much as 1 oz worth of oil even when nothing can actually be drained out of them. PAG and Ester lubricants are polar, so they cling to anything metal/desiccant media. Seen different field manuals where they list an oil return ...
by Al9
Thu May 27, 2021 4:07 am
Forum: Automotive Air Conditioning Forum
Topic: Filling R134a from high side in liquid state with engine *OFF*
Replies: 19
Views: 1335

Re: Filling R134a from high side in liquid state with engine *OFF*

I believe aftermarket vendors want to use updated designs whenever possible. I've used a Chinese aftermarket comp myself (though a Calsonic CSV/Delphi CVC/Zexel DCS type variable displacement piston rather than a scroll; the housing looks completely different, the control and relief valves are locat...