heat dont work

Asked by Feb 04, 2016 at 08:56 AM about the 1998 Chevrolet Blazer 4 Door LS 4WD

Question type: Maintenance & Repair

the heat comes out very little, cant barely feel it but its on # 4 ,, no floor heat
and no defrost coming out,,

3 Answers

I had something similar happened to my Jeep Cherokee. You may need to do a heater core flush and then you may want to check your vacuum lines. I know on some vehicles switching from different vent sections is vacuum controlled.

Maintenance and repair

57,515

No defrost and no floor heat, there sounds like there is a problem with the Defroster Mode Door Actuator that is vacuum operated. Also there may be a problem with the HVAC Air Inlet Door Actuator also.

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