How to fix a HVAC blend door issue?
Set the controller to the middle (12noon) and pulled the plug on the actuator. Waited 30 minutes (ate). Came back out, plugged it in. Pulled the HVAC fuses (firewall and dash) waited 30-45 minutes. Put them back in. Cycled the ignition key (not start) and left for 10 minutes (doors closed). Started truck, shut truck off. Pulled keys.
Is it possible to repair a blend door actuator?
The process of repairing a blend door actuator is not universal. Its location will likely be slightly different in every single vehicle, which can make it a little bit tricky when it comes to DIY repairs. The basic idea is the same from one to the next.
Why is a blend door called a door?
The blend door is called a door because it really is just a flat panel of plastic. It opens or closes to allow air flow in whatever direction is required. It’s about as low-tech as your car can get, where the actual technology is in the actuator itself.
Why does my Blend door make a noise?
If some of the teeth have worn down or broken off, then the gears will start slipping and create that bothersome sound. These gears are just plastic after all, and they are subject to some wear and tear at a much greater frequency than metal gears would be.
Can a heater be removed from a blend door?
If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit. To test the blend door operation and too double check that you are changing the correct actuator motor turn the blower motor on and work the door in each way. You will be able to feel the air change temperature or vent level.
What happens when you replace the actuator on a blend door?
Once all of the mounting screws have been removed the actuator should become loose. Grasp the actuator and pull it from its mount to remove. Before installing the new actuator it’s a good idea to manually turn the blend door in both directions to ensure it is not stuck which will cause the new actuator to fail.
What to do if your blend door blower is stuck?
If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit. To test the blend door operation and too double check that you are changing the correct actuator motor turn the blower motor on and work the door in each way.
How do you install a new blend door?
Just disconnect the electrical connector, remove the retaining screws and slide off the actuator. Then align the shaft of the new actuator to the blend door axle and install. However, before actually installing the new actuator, try rotating the blend door to make sure it’s moving properly and not binding.