Automotive Air Conditioning Information Forum

@thebandit

Too cold here now to get good readings. I found a great video from Chrysler Mastertech that explains a lot: https://www.youtube.com/watch?v=qNwStH5573c

Very nice tread!

Thanks! thebandit very helpful!

I did charge the system and the frost from the valve itself disappear. Cooler air from ac outlets now, but not that cool. The blend door cable was out of function, that's why I didn't get enough heat in the winter. Water valve seems to work and system sends vacuum as ...

Yeah, Im planning to upgrade it. I, and the previous owner, have been using it för about 5 years and the performance has declined over the last 3 years.

R134 and maybe a POA eliminator. Im not sure.

Thank you! I search for a proper gauge set.
The system haven't had a charge for many years. The air was quite cold a few years back so could be low on freon. Could a low charge cause a frosty POA valve?

Hey, no signs of conversion on the high side either.

If the pressure on the low side is right, can the system be undercharged and the PAO valve be frosty but the evaporator not especially cold? Im not familiar with this. I thought that if system is low on gas, the POA valve should freeze.

Sorry ...

POA valve.jpg

Hey

I have a big interest in old AC systems, manual or ACC like the Cadillac Comfort control or Chrysler Autotemp. My knowledge about the cooling systems is not the best and I have an old 1968 Buick Electra with AC that barely cools. I did check the pressure on the low side and got ...