Heater not working

  • 3.7L
  • V6
  • 2WD
  • 137,192 MILES
What is the next step once I changed my blend door actuator and heat is still blowing warm and not getting hot? My car is blowing warm and not hot air when I turn the heat on. I thought my blend door actuator was the problem in my car. I replaced the actuator and it seems warmer, but it is still blowing warm and not hot air.
Do you
have the same problem?
Friday, December 6th, 2019 AT 4:25 PM

1 Reply


Lets make sure you replaced the correct blend actuator which is have found the location of each in the diagrams below. There is also a temperature cam gear you need to check using a flashlight. Start the car and work the HVAC control to make sure everything is working the way it should.

This guide will show you how to replace the actuator step by step with diagrams below to show you your car:


If everything seems okay lets try a relearn for the HVAC.

Note: Do not operate any HVAC controls while the HVAC control module is calibrating as this may interrupt the process. If interrupted, improper HVAC performance will result.

Using a scan tool, perform the HVAC Actuators Learn in the HVAC Control Module. Follow the scan tool directions to complete the procedure.

Operate the system and verify that no DTCs have set as current DTCs.

Verify the unlearned actuator is physically rotating. A common cause of failure is an actuator that is electrically okay, but fails to physically rotate (e.g. stripped gears).

If the unlearned actuator is not physically rotating, replace the actuator, otherwise replace the HVAC control module.
Alternate Method (without Scan Tool)

Ignition OFF - Vehicle OFF.
Remove the HVAC control module fuse for a minimum of 10s.
Install the HVAC control module fuse.
Start the vehicle.
Wait 40s for the HVAC control module to self-calibrate.

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Sunday, December 8th, 2019 AT 2:13 PM

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