03 Yukon Blows Cold Air

ffchuckd · December 7, 2010

I have an 03 Yukon 2WD with dual zone automatic air. Suddenly I only get cold air from all vents. I am able to direct the air to the different zones yet it remains cold, including the rear air. The heater hoses going into the firewall are hot once the vehicle warms up. I replaced the air door actuator which is the one directly above the trans hump and still have the same problem. Is there a different actuator that needs replacing and where is it? Any help would be appreciated greatly. Also the A/C compressor appears to run all the time whether or heat or not. I pulled the fuse for the compressor and the air does not heat up.

January 2, 2011

I recently bought a 03 Tahoe, and my rear air is doing this. The front seems to be fine. It heats, and cools as it is supposed to. However, the rear air is always cold.

tpatsch · January 2, 2011

I recently bought a 03 Tahoe, and my rear air is doing this. The front seems to be fine. It heats, and cools as it is supposed to. However, the rear air is always cold.

Hey there, new to the forum here but have had the same problem in the past. Simple fix was the Blower Motor Resistor which is up under the passanger dash. It's easy to remove, recall it being a few screws. The Blower Motor is up there as well which you can also check to see if it's working. I ended up having to purchase the Blower Resistor from the dealer which was in the $80 range as the local auto parts store did not have it for my Suburban. Obviously can't go very long without heat in the winter. Hope this helps.

8.1HD/ALLISON · January 2, 2011

If it is dual zone, it should have an actuator for both passenger and drivers side. Also the rear has its own actuator. If all went cold at once, I wouldn't think it would be an actuator. Is the vehicle running at full temp? Could maybe have a thermostat stuck open?

January 3, 2011

If it is dual zone, it should have an actuator for both passenger and drivers side. Also the rear has its own actuator. If all went cold at once, I wouldn't think it would be an actuator. Is the vehicle running at full temp? Could maybe have a thermostat stuck open?

Not to hijack this thread, but where is the actuator located for the rear? Mine is the digital dual climate, and the front is working fine just the rear that only blows cold.