Floor Heat Works But Defrost Does Not 2006 Gmc Sierra

The temperature door diverts air over the evaporator for cool air or points the flow over the heater core for warm air.

Floor heat works but defrost does not 2006 gmc sierra.

Loss of hvac system mode and or temperature control replace hvac control module 04 01 39 007 06 17 2004 models. How do i replace it. Yesterday on way to brake shop it was working just fine. Retg mentions above that he has diagnostic charts.

Ac heater fan not responding to switch in 2007 sierra. I only have air at the vents no defrost or heat at floor. All frontal vents and floor vents work fine and can be switched between without problems. Carmakers have used this basic design for 100 years.

Also the highest fan speed does not work all other speeds are ok. Fan only blows defrost won t change to floor or vent. 2006 gmc sierra w dual auto climate control. I have a similar problem.

Stuck won t switch to defrost of floor. Once defrost is selected the blower motor keeps spinning but the top vent won t open. 2006 dodge ram 1500. Used gmc sierra 1500.

2006 slt 4x4 no floor heat 2 answers. Heat cold works fine. The blend door diverts the airflow to the defroster vents in the upper dashboard the floor discharge for heat or the center vents for air conditioning. I didn t notice anything on the way home i was still in 400 00 shock but today i noticed it.

As a new user and first post i am unable to email him. No output on dash face vents or defrost vents but floor works ok. I have tried the pulling the fuses both under hood and left of dash but that did not fix my problem. On my 2006 gmc sierra the a c heater mode stays on vent even when changing the control to the floor or defrost positions.

724 great deals out of 33 084 listings starting at 1 999. 2002 cadillac escalade escalade ext. 2000 silverado 5 3 4x4 my hvac actuator mode valve does not work. Heat won t transfer from vent to floor when put on floor heat blows from defrost.

The only issue arises when you go to put it to defrost.