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Mazda Ed
Mazda Ed, Auto Service Technician
Category: Chevy
Satisfied Customers: 2223
Experience:  ASE Master Technician, Mazda Master Technician, GM and Ford factory trained. 15 years experience.
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1996 gmc: jimmy 4.3L/ac/4x4/ has no heat..flushed..heater core

Customer Question

1996 gmc jimmy 4.3L/ac/4x4/ has no heat .new lifetime warrantied thermostat,flushed system,Replaced heater core,reflushed bypassing new heater core,still no heat...hhhhheeellllpppp!!!!!!
Submitted: 9 years ago.
Category: Chevy
Expert:  Mazda Ed replied 9 years ago.


First of all does the engine get to operating temperature on the gauge?

Do the heater core hoses both feel the same hot temperature?

Customer: replied 9 years ago.
yes, reaches normal temp..and yes hoses seem to both be really hot.
Expert:  Mazda Ed replied 9 years ago.
Do all other functions work? Are you able to change the blower speed and the location where the air blow out?
Customer: replied 9 years ago.
yes .i can change location of blowing.and it works normally..just no heat
Expert:  Mazda Ed replied 9 years ago.

Ok, this sounds like a problem with the HVAC controls or the temperature door. Verify that the temperature door is moving when commanded to different temperatures. If it is not then we will need to check the controls.

Customer: replied 9 years ago.
I.m not sure where temp door is is now running ..are ya still there? Been an hour I'm not sure if I lost you or your major busy..should I try a new question??????