2004 Durango Heater Problem

[rbrowning]

I have read the other threads and I am not sure that my problem is the same as theirs.

I recently had the water pump replace (late last summer). Now that it is winter, my heater does not blow hot air (warm air at best).

One thing I have noticed is that my temp guage only goes up about 1/4 of the way - even after extended driving.

Do you think the problem is the thermostat, or should I look to the heater core?

[cbreeze191]

I'd probably clean out the heater core. I've done it to my 99, it only takes a few minutes to do. If your temp guage is in the normal zone that just means your thermostat is indeed working. Good Luck!!! Just follow tommychau's instructions you'll do fine.

[BleedDodge]

Indeed working yeah, it's probably stuck open.

[cbreeze191]

Also a good possibility, on the 5.2,5.9 I believe the stat is located underneath the alternator. To get at it you'll have to pull the alternator off.