Re: Add-On-Air Conditioning, 54 Cavalier.

Posted by PackardV8 On 2012/5/18 13:10:45

Not related to electrical issue but to rapid temperature pull down:

Check the Ranko valve in the heater system. These can go bad and hang open. Mine hangs open just a little allows for some heater heat to enter car. Everyone wants to rebuild / replace the Ranko valves as if they were some kind of a shrine or something. I just put a common houshold plumbing shut off valve spliced into the heater hose. When it is OFF i KNOW it is OFF, especialy in the hot summer time.