Download If your climate control only has two settings: HEAT and MAX A/C then the chances are this fix will work for you. Step 1: Remove the glove box to gain access to the plenum. There is a release on the left hand side of the glove box. Step 2: Locate the actuator. The actuator is a flat white box that sits on 4 clip posts on the top left of the plenum. It has a wiring harness coming out of the front. Step 3: Remove the actuator. Use a flat head screwdriver to pry up the actuator. Pry up the front first and then put the screwdriver under it to pop up the back. (Note: I unplugged the wiring harness when I removed mine. If you also unplugged the wiring harness you will need to plug it back in before doing step 4). Step 4: On the bottom of the actuator there is a “D” shaped pin. Turn on the ignition and move the heater control on the dash. You should see the pin rotate (wiring harness must be attached!). If the pin does not rotate then you have a different problem (bad actuator, terminals corroded, etc).