As lengthy as your engine is running, there"s heat to be had. Shot recalibrating the furnace or instead of the blend door actuator if there isn"t heat.

You are watching: Where is the blend door actuator located


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Family Handyman
go your vehicle heater simply blow cold air when you revolve on the fan? It could be as basic as recalibrating the heating system or instead of the actuator. We"ll present you how.
blend door actuator

Heater blows cold air? situate the mix door actuator

Where is the mix door actuator located? eliminate the glove box and also under-dash trim panels to find and also replace the door actuator.
blend door actuator

Test the door shaft

Remove the screws and lift off the mix door actuator. Twist the door tower or rotate the affiliation to see if the door opens and closes smoothly.


Car not blowing warm air?

Most late-model car use electric motors (called actuators) to change the wait temperature and also direction that the airflow by opening and also closing flaps in the heater box under the dash. If her battery has actually gone dead, or you’ve disconnected the to occupational on your vehicle and also now friend can’t adjust the wait temperature, girlfriend probably simply need to do a recalibration.

Find the procedure in a shop hands-on (at auto parts stores for about $20). But if your auto heater blows cold air and you’ve checked both heater core hoses to make certain they’re hot, girlfriend likely have a bum blend door actuator. You have the right to usually diagnose and also fix the difficulty yourself in about an hour. A brand-new door actuator expenses less 보다 $100. Every you need is a shop manual, a 1/4-in.-drive socket collection and screwdrivers. Here’s how.

Consult the repair hand-operated to recognize which actuators regulate the defrost-vent-floor “mode door” and the temperature-regulating “blend door.” then peer under the dash and also locate the doubt actuator on the heater box. Have actually a girlfriend switch in between modes or temperatures while you watch the actuator. If the actuator doesn’t move, it’s most likely bad.

There’s a opportunity the mode or blend door actuator might be good but the door or link is binding, so check it prior to you replace the actuator (photo above). If the door binds, take it it to a pro for replacement. However, if it move smoothly, buy a brand-new blend door actuator native the dealer or auto parts store. Download it and also test the operation. In some cases, you’ll need to perform a calibration.

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Required tools for this Project

Have the essential tools because that this DIY task lined up prior to you start—you’ll conserve time and also frustration.Socket/ratchet set You’ll also need a flat-blade screwdriver and a Philips-head screwdriver.