Search found 373 matches

by JohnHere
Wed Jun 23, 2021 7:49 am
Forum: Automotive Air Conditioning Forum
Topic: Low side normal /high side low stumped
Replies: 14
Views: 72

Re: Low side normal /high side low stumped

"I put all the new parts on" John, what does this mean? That he changed out the evap and condenser as well? If that original comp grenaded then as you know he has more problems yet. I had trouble following his writeup especially when he said his hi is supposed to be 350 I took the comment...
by JohnHere
Wed Jun 23, 2021 7:18 am
Forum: Automotive Air Conditioning Forum
Topic: Low side normal /high side low stumped
Replies: 14
Views: 72

Re: Low side normal /high side low stumped

As mentioned previously, I think we need more information to diagnose this. To review, you replaced the entire A/C system after it was left open for more than a year without a compressor on it...a good idea IMHO. You mentioned that you "oiled" it, vacuumed it, checked for leaks, and charge...
by JohnHere
Tue Jun 22, 2021 8:46 pm
Forum: Automotive Air Conditioning Forum
Topic: Valve cores
Replies: 7
Views: 163

Re: Valve cores

You have a couple of options in replacing the Schrader valves: Either have the charge recovered, which will allow removal with zero pressure in the system; or use a set of valve-core tools that allow removal while the system is still under pressure. Either way, when you get them out, you can then ma...
by JohnHere
Tue Jun 22, 2021 8:51 am
Forum: Automotive Air Conditioning Forum
Topic: 2016 Ram line sizing issues (#4 size?)
Replies: 4
Views: 39

Re: 2016 Ram line sizing issues (#4 size?)

I reread your post several times, and I think I now know what you're trying to do. Since you're going to need new custom hoses anyway in order to reach the bed-mounted condenser, why not cut-off (from the existing hose in the engine bay) the TXV-side fitting and reinstall it on the new hose? That'll...
by JohnHere
Tue Jun 22, 2021 8:32 am
Forum: Automotive Air Conditioning Forum
Topic: Low side with extreme high pressure
Replies: 1
Views: 30

Re: Low side with extreme high pressure

This sounds to me like an overcharge condition. The specs for your vehicle call for 18 ounces (1.1 pounds) of R-134a and 3.4 ounces of PAG-46. With the charge amount being so small, it's pretty easy to overcharge a system like this. If you're using the individual 12-ounce cans of refrigerant and not...
by JohnHere
Tue Jun 22, 2021 8:15 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor,TXV, or Scroll valve
Replies: 1
Views: 25

Re: Compressor,TXV, or Scroll valve

The compressor on your vehicle is known for two issues: The control valve (sometimes called a "scroll valve") malfunctioning, and leakage of refrigerant/oil at the mating point of the two case halves. If you can get under there with a strong light to take a look at the bottom of the compre...
by JohnHere
Tue Jun 22, 2021 7:55 am
Forum: Automotive Air Conditioning Forum
Topic: 2012 Dodge Grand Caravan AC issue driving me nuts.
Replies: 28
Views: 214

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

Your specs are way off. The tag on the vehicle are something like 1.6 pounds for single, 2.6 for double. That's off memory so it's not exact. Your memory was pretty close to the actual: 6 cyl. 3.6L eng., without rear A/C -- 29 ounces (1.8 pounds) of R-134a and 4.0 ounces of PAG-46. Same engine, wit...
by JohnHere
Mon Jun 21, 2021 10:22 am
Forum: Automotive Air Conditioning Forum
Topic: 2012 Dodge Grand Caravan AC issue driving me nuts.
Replies: 28
Views: 214

Re: 2012 Dodge Caravan AC issue driving me nuts.

From the video, it sounds like the engine is at idle speed. If so, try bumping it up to a steady 1,800 RPM, blower on medium, A/C on "Max," windows open. That should also help with getting the rest of the charge in. Then see what the pressures do. Double-check the fans, which at that point...
by JohnHere
Mon Jun 21, 2021 9:36 am
Forum: Automotive Air Conditioning Forum
Topic: 2012 Dodge Grand Caravan AC issue driving me nuts.
Replies: 28
Views: 214

Re: 2012 Dodge Caravan AC issue driving me nuts.

I don't think it's the rear TXV. It sounds like a condensing problem to me. Is the condenser externally clean of any leaves, bugs, and errant plastic bags? Are the fins making good contact with the tubes? Are the fans coming on?
by JohnHere
Sat Jun 19, 2021 8:07 am
Forum: Automotive Air Conditioning Forum
Topic: Auto A/C for beginners
Replies: 3
Views: 122

Re: Auto A/C for beginners

One way leaks are common and drive you nuts. One of the reasons why diagnosing and repairing MVAC often can be mystifying, time consuming, and expensive. Be sure your gauge set and couplers are tight; the seals at the knurled ends can be changed out Checking your manifold gauge set and hoses is alw...