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Heater Issue
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01-09-2008, 01:50 AM
HUMTECH
Hummer Authority
Join Date: Sep 2003
Location: Canada
Posts: 1,251
Re: Heater Issue
Check the heater shutoff valve located behind and below the batteries, an electric actuator that allows coolant flow through the heater core. If this actuator is not working you will get no flow through the core.
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