Angie2004Expy
New Member
I have an 04 Expy. I dont know if all this is related but I am going to give it all to you. My heat does not blow hot air. I can warm up the truck and set the temp at 90 degrees and it blows lukewarm air at best. I have the dual climate controls and the air temp is the same whether the dual function is off or on. The rear heat only blows cool air. There is no change in air temp if I change the source from vent to floor or defrost (on both front and rear) There is a ticking sound when the rear heat system is turned on (I assume a flap on one of the rear vents is not opening). Coolant levels are fine. Truck temp is mid-line. I sat in traffic and the temp gauge never more, so there are no signs of over heating. The cabin temp gets a little warmer when I am driving, I guess because the warm air from the engine is helping. The fan is blowing fine. Its an older truck so maybe a vacuum leak? I am leaning away form a thermostat since I am not overheating. Help me!! it cold outside! What should I check? I am slightly mechanically inclined, but not fluent in car talk, so please keep that in mind. Thank you