This is on a 2000 ford explorer 2 dr. What controls the Heater?

Answer 1

I just did this on mine- if your temperature guage doesn't move, you have to replace the thermostat- this will give you heat back in the truck and really had an effect on fuel economy as well... if the motor thinks its cold it feeds it more fuel. This also caused my check engine light to come on. If you have the 4.0 V6, it is located on the top of the motor, in the middle at the front- you'll have to take the plastic cover off as well as loosen the clamp that holds the breather on to get at the back bolt- 3 bolts hold the cover on for the thermostat, metric socket size 11 mm I think it was. Most autoparts stores have the thermostat, it was $22.00 and yes, it's a bit of a pain to get at but takes all of 15 minutes to change.