How To Calibrate Blend Door Actuator On Jeep Wrangler?

The blend door actuator partly controls your Jeep wrangler’s temperature, yet occasionally it may only emit hot or cold air. Since you’re unable to regulate the temperature inside your car, this might be a severe issue. The first fix that will come to your mind is that the blend door actuator needs replacement. However, calibrating it again can solve this problem. 

So, how to calibrate the blend door actuator on a Jeep Wrangler? Calibrating the Jeep Wrangler door actuator is quite easy, and you can easily do it yourself by following simple steps like removing the fuse and reinstalling it.

Thus, If the blend door actuator is having temperature-controlling issues on your Jeep and you are looking for how to do it, we are here to help you.

Where Are The Jeep Wrangler Blend Door Actuators Located?  

The blend door actuator consists of a small electric motor enclosed in plastic. These doors have a very special function to combine hot and cold air to produce the appropriate temperature. This whole system is connected to your car’s computer that controls the climate. 

Depending on your vehicle type, there can be one or two blend doors. Both the driver’s and passenger’s sides of the vehicle have these. 

However, on any Jeep Wrangler model, you can find a blend door actuator on the driver’s side beneath the steering column.

What Problems you may solve by calibrating the jeep wrangler blend door actuator?

Blend door actuators are important for maintaining the proper temperature inside the Jeep Wrangler. But, when it is unable to control the temperature you will need to calibrate it. Read below to know more about these problems.

HVAC System blows air of the wrong temperature

If you turn on the HVAC system and notice that it is not blowing air of the same temperature, then the blend door actuator can be the reason. 

Hence, you will need to calibrate the blend door to solve this issue. Moreover, if you notice that it is only blowing too cold air or too hot air, it also indicates the actuator needs recalibration. 

Knocking sound in the dashboard

Another common problem that you can fix by calibrating blend door actuators is getting rid of knocking, clicking, banging, or other sounds under the dashboard. 

Door not Aligned

If you notice that the door is not equally spaced from the rest of the frame, this means the actuator is out of calibration. To ensure that the door in your Jeep Wrangler is perfectly spaced, you will need to calibrate the doors properly. 

Unusual Resistance in the door

When the blend door actuator is out of calibration, you will feel resistance while trying to open or shut the door. So, calibrating the actuator can help get rid of this issue quite easily.

How To Calibrate Blend Door Actuator On Jeep Wrangler? 

Calibrating the blend door actuator on a Jeep Wrangler isn’t that difficult, and the process is almost the same for all models of Wranglers. So, no matter what year of Wrangler you use, follow the steps below to calibrate properly.

Step 1: Turn the ignition key

Turn the ignition key to the “On” position. Make sure the brake pedal is engaged before starting the engine. The recommended option is to do the calibration outside or if you want to do it inside, make sure the area has excellent ventilation. 

After turning the ignition, press the temperature control’s “Auto” button. As soon as the controller’s display indicates “Auto,” turn your Jeep off.

Step 2: Remove the HVAC fuse

To remove the fuse for the HVAC actuator or AC controller system, open the hood of your Jeep Wrangler and proceed to the fuse box. The fuse in a Jeep Wrangler is concealed behind a plastic cover right next to the battery. You can check your car’s fuse box diagram if you’re still unclear about the position of the HVAC fuse.

Step 3: Remove and reinstall the IOD fuse

Now you will need to remove the IOD fuse, it’s a 10-Volt fuse which is located in the fuse box. Simply take the fuse out of the power distribution center. 

Wait for a couple of minutes and then reinstall the IOD fuse in the same position. After putting the IOD fuse, also reinstall the HVAC system fuse that you had earlier removed.

Step 4: Turn on the ignition

After putting back all the fuse, turn on the ignition, and the HVAC system should show Auto at 74 degrees, and this should be an indication that everything is reset. 

Keep your Jeep turned on and let the engine heat up a bit. To re-calibrate the blend door actuator, all of the tiny doors inside the AC system will fully open and close.

Step 5: Turn off and turn on again

You will need to turn off your Jeep Wrangler again and turn it back on after around 20 seconds. Make sure the maximum heat setting is chosen on the climate control system, and turn the blend door shaft towards the direction where the vents are producing the most heat. 

Recheck and play a bit with the climate control settings to make sure that both cold and warm air is blowing. You’ve properly calibrated your Jeep Wrangler if you can see that everything is operating normally.


Below, we will answer all the faqs you might have wondered about after reading this guide so far.

Can you manually turn a jeep wrangler blend door actuator?

A blend door actuator can be turned manually, although doing so is not advised. It is important to avoid turning the door manually since if you do it manually, it might result in damage to the actuator or the blend doors.

Does the jeep wrangler blend door need to be open or closed for heat?

When installing a new blend door actuator while replacing an existing one, ensure the blend door position is entirely closed. The temperature inside the car won’t match the A/C setting set if the blend door is even slightly left open.

Can you drive a jeep wrangler without a blend door actuator?

A blend door actuator is a crucial part of the HVAC system in your Jeep Wrangler. It assists in controlling the cabin’s circulation and temperature. Although driving a Jeep Wrangler without a blend door actuator is possible, it is not advised since it can make the ride unpleasant and bothersome.

How many blend door actuators are there on a jeep wrangler?

A Jeep Wrangler really has three actuators fitted, each of which is in charge of a certain task. You will find the directional actuator, the recirculation door actuator, and the blend door actuator. All these regulate the air wall behind the glove compartment. 

Is a mode door actuator the same as a blend door actuator?

The blend door actuator and mode actuator are different from one another because the blend door regulates temperature by shifting a door and enabling more or less air to pass through the heater core. In contrast, the mode door regulates which air vents are opened.


We all know how useful blend door actuators are on a Jeep Wrangler, so when it starts to malfunction, problems start to arise. Calibration can help solve these issues, and we believe by now you already know how to calibrate it properly. 

There is no need to go to a mechanic to calibrate the blend door actuator on a Jeep Wrangler, and you can save some money by doing it yourself. 

Make sure to follow the steps properly and be careful to pull the correct fuse out. If you are confused about the fuse, always refer to your Jeep Wrangler user manual.

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