- Mar 13, 2014
- 12
2002 EXT Several months back (when it was hot) I had a leaking heater control valve replaced. Now, since the weather has turned cold, I have found that the rear heat isn't blowing hot. I have checked the actuators and they all function as intended. The coolant hoses under the truck in the rear are only warm-not hot. Is there a way to test the heater control valve? The front heat works great, but my kids are getting cold.....