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heater control valve 900 1993

posted by  Brenson on  Mon Feb 27 06:07 CST 2006
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last visit: Mon Aug 29 08:35 CST 2011
[RELATED]

What is the function and purpose of the vaccum control valve in the heater hose between the head and the firewall? The plastic hose barb broke and I temporarily replaced the valve with a short length of copper tubing. I assumed that I would have full on heat but not so! The heat is still regulated from the dash controller. Why should I replace the valve? Brenson






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