Hummer 3 blower works, but is not blowing heat

Asked by Denia Mar 02, 2017 at 06:38 PM about the 2007 Hummer H3 4 Dr Base

Question type: Maintenance & Repair

2007 Hummer 3
Blower works, but no heat,  heater button in the correct position for heat, just
blows cold air.. Any answers?

3 Answers
35,295

lrodri911 answered 7 years ago

Check to make sure coolant temperature is going up to normal operating temp. If not, replace thermostat. If it is, check to see if coolant is actually circulating through the heater core. If everything looks normal, check the climate control switch. If everything checks out ok, check the blend actuator

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