[urq] A/C Solenoid Valve Operation
a.sigal at bluewin.ch
Tue May 8 14:55:55 EDT 2007
That solenoid allows more air in, and raise revs when AC is on. It
shouldn't have same PN because it has larger dia hose connections.
Default position is closed air passage. When it fails, it will stay in
closed position because return spring keeps it shut and there is no
electromagnet power to open it. If it stays open without power, its
usually the gunk inside, which can be cleaned. I it clicks nicely, but
still stays on in either switch position, there is problem with wiring.
Maurits Jonkergouw wrote:
>As I understand correctly, the switch which turns on the A/C, also switches the solenoid valve underneath the watertray (same P/N as the solenoid for the WOT switch on the firewall). What exactly is the purpose of this solenoid regarding fuel economy?
>I was wondering if this solenoid (for the A/C) is faulty (and I know it is), will it stick in 'A/C ON or OFF' mode? When these solenoids go bad, do they always stick in OFF mode or ON mode? (0 vs +12 Volt).
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