NO HEAT

[HUNTERMAGNUM]

I have heat in the front of my suburban for a few minuets and then it turns cold. Have heat in rear and works great all the time.
Is there a fix for this?

 

[zora]

Can't tell what year you have but have you ever flushed the front core?

 

[HUNTERMAGNUM]

yes i did last year and same thing.

 

[zora]

start the vehicle, set the temperature to hot, turn off the vehicle, pull the HVAC fuse, wait 3 minutes, reinstall the fuse, start the truck, do not touch the temperature controls, see if heat comes out after a few minutes.
Beyond that it could be the controller or the blend door actuator.
A tech tool would have to be used to determine the cause.

 

[HUNTERMAGNUM]

THANK YOU, i WILL TRY THAT