Question about 1997 Chevrolet Blazer

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1997 S10 Blazer heater will not work (I live in Minnesota)

I replaced the thermostat but that wasn't the problem.... One of the heater hoses is hot, the other luke warm to the touch. I installed a "T" w/removable cap in the water pump heater hose to check flow - there was nothing at idle. Question 1: is the water pump hose the supply side? Question 2: is there a flow control valve in the heater circuit?

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  • jrp_340 Jan 02, 2009

    So the hose from the intake manifold is "supply/in"and the hose that goes to the water pump is "return/out", right?

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Water flows from pump to intake, check vacume hoses very good.

Posted on Jan 01, 2009

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