2005 Ford Explorer Q&A
2005 Ford Explorer Question: heater problems.
What if you go to turn on the heater and it makes a real loud noise and blows out cold air? when it turned to cold air it does not make the noise. Its like in the flapper that switches it hot to cold. - Visitor
The temperature blend door is malfunctioning. It is located inside the dash as part of the heater plenum assembly. On a 2005 Explorer, things get tricky. Some of these needed only the temperature blend door motor replaced (fairly common across the Ford line of vehicles for years), and a healthy amount also experience cracking in the plenum housing where the motor attaches. In this case, you have to replace the entire plenum box. The only way to know is to access it and look. This requires dash access/removal. Good luck! - DaveJHM
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...
I bought vehicle without checking if the heater worked. The A/C works fine. The heater blows cold air and I do have antifreeze.
heater is blowing cold air heater hose is hot going in and the other is not where is the control valve located on the 1997 ford explorer