Automotive Air Conditioning Information Forum

So you don't have a scale - so exactly how did you add your R134a? Did you guess from individual cans, to get to the amount of ounces on the underhood sticker of your Mazda? Did you purge your hoses? Did the system hold vacuum (28 is a little low)?
With modern vehicles, it's very important to get ...

Although Toyota began converting to R-134a late in model year 1993, your '93 Pickup used R-12 and ND-6 mineral oil, according to the documentation I have.

I think you're right to presume that your truck was converted to R-134a sometime in its past based on the fittings on the service ports. Do you ...

I wouldn't recommend introducing any R-134a into an R-1234yf system to check for leaks. The US-EPA has mandated special fittings for R-1234yf systems to specifically prevent illicit conversions to R-134a, as well as the mixing of the two incompatible refrigerants. The EPA has done this by means of ...

tbirdtbird wrote: Sun Jul 07, 2024 8:21 am Tim and John, and anyone else, I am happy to be back on the board after a bit of a break , sry for ghosting y’all

I knew you would be off for a while. Glad you're back now

IMHO, it's nothing electrical. I'd say that it's a classic low-charge condition causing the evaporator to ice up, which in turn blocks airflow.

I had that in the back of my mind as a possibility.

Ostensibly, it senses the temperature only at the TXV, not at the evaporator, which to me is of greater importance to prevent ice-up and blocking airflow through the evaporator. Leave it to Chrysler Corporation (Stellantis) to design-in something ...

As you probably know, you achieved a great vacuum on the system. The slight decline in 15 minutes might be due to outgassing of the oil and desiccant, the last vestiges of whatever contamination might have been inside the system. For the most part, since the vacuum seems to be holding (overnight ...

Suggest coiling-up the excess length and tucking the coil out of the way. Don't kink the thin, fragile tube, though. A kink might prevent the TXV from receiving the desired "signals." Also, ensure that the bulb is firmly clipped to the tube and that the whole shebang is insulated with something like ...

tbirdtbird , you probably didn't see the actual link, and didn't go to the site itself, because the Site Administrator of this Forum promptly deleted it. The suspected site promoted a national, well-known brand of R-134a, complete with an apparently pirated photo of the 30-pound cylinder and ...

Appreciate your posting the clarifying photos.

Guessing that it's just a convenient place to secure an electrical connector, that it's not associated with the TXV's operation, and that it doesn't matter which way it plugs in. Otherwise, the connector would be indexed to "mate" only one way ...