For the past couple weeks my commute has been a bit chilly. Engine heats up quick and the gauge stays solid on the center mark but the heater takes half hour before it throws warmish air out the vents. Antifreeze is at correct level and concentration.
I'm thinking it's got to be the climate control or maybe a stuck blend door. How/where do I test for blend door movement?
2G 4.0 196,000
Last Edit: Nov 21, 2019 16:35:13 GMT -6 by guy48065
First check the heater core inlet and outlet hoses at the firewall. With the engine at operating temp, they should feel close to the same temperature. If one is warm and the other is cool, the core is restricted.
To check the blend doors you'll have to remove the actuators on each side and move them by hand. There's a location diagram floating around here somewhere...
Lastly, if it's the HVAC controller, that's pretty much pull and replace.