2003 chevy tahoe

[Tahoeloss]

Have no heat in front changed blower resistor still no heat blower is working at all speeds just no heat any suggestions would be appreciated thanks

[777stickman]

Is there heat in the rear?

[j cAT]

Originally Posted by Tahoeloss

Have no heat in front changed blower resistor still no heat blower is working at all speeds just no heat any suggestions would be appreciated thanks

blower works no heat/hot air so why the blower resistors ? put hands on the heater hoses both must be hot . even if the heater is off. even if you have the ac set to max cool those hoses must both be hot . so if not both hot then there is an air bubble in the coolant system or you must remove the heater hoses at the engine and using a water hose flush out the blockage. if an air bubble which can happen you remove the coolant pressure cap engine cold you then start engine idle engine till it gets up to temp then rev engine to 2K rpm see if the bubbles come out and the hoses both are hot. if it has air you may notice a coolant level drop . then we get into a ice issue . ice from low antifreeze concentrations . get a tester and make sure it has 60% antifreeze in it.so its set to 34 deg F below zero.

[Tahoeloss]

Yes there is heat in the rear and I will check for the air bubbles and hoses thanks

[777stickman]

OK, You have heat in the rear system, so most likely you don't have air bubbles, etc. But good to check anyway.

I'm thinking that the issue is with the front "temp control" door or its actuator.

[j cAT]

Originally Posted by Tahoeloss

Yes there is heat in the rear and I will check for the air bubbles and hoses thanks

if the hoses are both hot then the temp door or the HVAC computer controller may need to be reset. I have had this happen a few times over 16 yrs. disconnect the battery ground . then discharge the vehicles electrical system for 15 min.. see if the heat returns. if that does not work the temp door could be stuck. the temp door is controlled by a stepper motor. I have found the over the years the plastic changes shape and this can cause it to bind as well as debris in the air box. I removed this motor and added some washers to shim the motor from the air box slightly so it can move with no interference . this is above the tranny hump at the lower portion of the hvac air box.

[Tahoeloss]

Thanks I will try that