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Re: Wimpy Heater/4000q



The lack of heat is not normal. The heater-core flow control valve is located 
right in front of the firewall and in-line with one of the heater-core hoses 
that go through the firewall. It's a little black box in-line with one of the 
hoses and has a cable attached to a little black lever. Be sure the lever goes 
all the way to each stop when the temp control is at max low/high. This little 
valve can also cause poor AC performance if it is not totally closed  and 
stopping the flow 100% when the temp control is on max low.

-glen