On the split systems there are two actuators for temperature. The one for the passenger side is on top of the HVAC housing. To reach it you need to remove the dash and the actuator is the first item on top of the case. However, you might wish to try doing a
re-initialization of the actuators first.
That involves turning the key off, then removing the HVAC/ECAS fuse (10 amp in the underhood fuse block) for 20 seconds at least. Now put the fuse back in and start the truck. The actuators will self calibrate in under a minute. Try the heat control. If it works great, if not then you need to replace the actuator.
On the fan speed, which speed do you have? Is this the manual system or the automatic version?
Images (Click to enlarge)
Tuesday, July 28th, 2020 AT 10:22 AM