2004 Ford Explorer Q&A
2004 Ford Explorer Question: Heater blows cold air
There are many variations to the heater controls depending on options, engines ect.....The heater has vacuum operated actuators that move heater flaps any of which could fail or loose a vacuum hose attached to it which would effect proper heater operation. The heater control valve is in the engine compartment near the firewall toward the center rear of the engine ensure the vacuum hose is attached to it. If you fell competent to doing some of the tests yourself, Autozone have some popular vehicle workshop manuals free on line on there website or there is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You get a one year subscription to year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual. http://www.alldatadiy.com/ - patrick mannion
1997 ford explorer is the control valve for the heater in the same location as the 2004 if not where is it located 4.0 v six - pgroth
I have the same issue seems to be a design flaw if so many are having the same issue. - Visitor
Heater core is fine, it blows cold air, the air conditioner works fine. not sure what the problem is. it did work fine till yesterday when I tried to use it. the weather was good here for a few day...
heat was fine turned car off for a minute started it up no heat. blows cold air. can here it change from vent to defrost to floor but no heat.
Heater blows cold air and after 20 miles or so it will start getting warm. It then starts blowing cold again. It goes...
driving at 55 mph in 7 degree F. temperature my heater only blows cold air
when i turn heat on no heat just cold air