Engine Size: 1.6 L
After about an hour of driving, the low side line freezes up and not much air comes out the vents. Switch in the high side line has been replaced. From reading on the internet, it sounds like there is a control valve in the compressor that might be stuck. Is this something I can change or do I have to put on a new compressor?
It's a V5 so you should be able to replace the control valve if needed. Be sure to use the correct color control valve.
It's a blue one. I gave him your phone number so he can get one ordered.
I had a similar freezing problem at highway speeds. I replaced the o rings on the control valve and the problem went away.
So this isnt really a huge deal. My mothers 2007 does this.
2008 Chevrolet Impala LS
1981 Pontiac Bonneville
2007 Sears Craftsman Lawn Tractor
1985 Chevrolet Caprice
1986 John Deere 165 lawn tractor
Another thing that will cause freezing is if someone opened the system and then recharged without removing the air. It can freeze at the proper pressure if the refrigerant is not pure.
It does that also.
The issue in the evaporator is that the partial pressure of refrigerant in the mixture is less than the total pressure that the control valve sees, so the evaporator temperature can go below what would be expected. The same physics make an Electrolux-cycle heat operated RV refrigerator work. Even though the pressure in the evaporator and condenser and throughout the system is nearly the same, the composition of a mixture of three fluids varies in the different parts.
Edited: Tue August 19, 2014 at 9:01 AM by mk378
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.