markwhit

So what was happening with mine 2004 is that it would blow cold and then start blowing hot. I noticed when it wasn't blowing cold the cooling fans and the compressor would come on and off like every 2-3 seconds. So the first thing I did was replace this high pressure switch in the front since I have read where they go bad. It was $30 off ebay. So I replaced it and then put Freon in and haven't had any more problems. You need to be careful because once you start to unscrew the switch it will start blowing our Freon so may want to let it release the pressure before you actually pull the switch all the way out. It is in front of the radiator on the right. See pic.

RA40

iTrader: (6)

Glad you solved your A/C issue. The 430 use R134a, did you charge with Freon?

Just to note that Freon, R134 and other refrigerants are supposed to be collected and not vented per EPA.
https://www.epa.gov/sites/production...ipDisposal.pdf

markwhit

Yes I added about two cans of A/C Pro with the gauge you can buy at Walmart.

2KHarrier

You may find you have problems with the system in the near future, as you did not evacuate the lines before pressurizing it. The lines should be brought under a vacuum, and then you charge it. If you charge the system when it's under atmospheric pressure, it's likely to stop working. You may want to have it re-serviced at a reputable A/C shop

markwhit

I will keep my fingers crossed that it keeps working. Been two weeks now with no more problems and in the 90's in Georgia.

hyperopt

Yep, the proper way is to evacuate the AC system before charging it. If you don't have a vacuum pump, you can at least purge the system before charging. Any moisture that had entered the system and not trapped by the dryer will eventually corrode the system and can lead to failure. Only time will tell.