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Heater linkage? issues - 1987 RX
Posted 31 March 2004 - 01:04 AM
If I have the heat on, in the Heat position, and then click it to the defrost position, it doesn't always seem to take. By playing around with it, i've found if the engine is in vaccuum it has a greater chance to switch.
What could be the problem here? I'm pretty sure it has to do with the vaccuum actuated part of the system. It could very well be at the engine compartment end of things... I have messed around with the vac. lines quite a bit.
Any insight would be appreciated!
Posted 31 March 2004 - 01:19 AM
My wagon will do that sometimes on a hard pull (low vac), I think that the VENT setting is the default for the system without vacuum applied. It could be a bad/leaking check valve in the line that feeds the vacuum storage tank. Or there could be a small leak in the heater control vac system so that its depleting the vac tank during low vac/boost conditions.
Just my first thoughts
Posted 31 March 2004 - 01:22 AM
Sometimes modifying is a pain in the arse! I just want my windows to stay clear.
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