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Registered User
Join Date: Feb 2004
Location: Queens, NY
Posts: 83
Bypassing Heater Control Valve

I looked at my heater control valve today and saw that it was leaking but from where? who knows...i took it out, cleaned it, tested it with air pressure, one of my friends tells me its

I took it out and replaced it with a small copper tube, tightened the clamps and voila no more valve...i still however hooked up the heater control valve to the vacuum inlet and just left it there in the car, is this ok to do? Can I just bypass the heater control valve or will I have all this heat blowing through now, in the middle of friggin summer. I tested it and it seems to be ok no more leaks and then I tried turning the heat on but I only felt cold air coming through, and no my A/C does not work, theres no gas in the system.

1986 Guards Red 944 Turbo
Old 07-15-2004, 05:04 PM
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Registered User
Join Date: Oct 2002
Location: nashville,tn
Posts: 1,112
You will eventually get really hot. You must not have let it run long enough to heat the water up. The heater control valve is what it's name says. You might want to take a look at just capping it off. What gave your friend the impression that it was bad. If you are not getting hot in the vents, it is holding the water back. You are smart to get rid of the leak though. When they leak at the valve, it can get into the bell housing and play bad things on the clutch. I have a couple of good used ones from the parts cars. 20.00 and I'll cover the shipping.
Drop me a line if you like
86 944 daughters
88 944 step-sons
07 Ranger 4x4

I have tons of spare parts, let me know what you need.
Old 07-15-2004, 07:46 PM
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