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How to replace the ac servo motor

Servo motor not working to switch from heat to cool

Posted by Anonymous on


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 1861 Answers

SOURCE: AC temperature

Servo motor? I disagree. Actually, there are 3 servo motors in the vehicle; an air inlet servo, an air mix servo, and an air outlet servo. None of which control the temperature.
The AC temp is controlled by a thermister in the cooler box/eveporator unit under the dash.

Posted on Sep 10, 2008

  • 1 Answer

SOURCE: front panel temperature control switch

Very likely the blend door is broken. This door is mounted beside the heater core, blends cool air with hot depending on the position of the door. At the bottom of the door at the hinge point, there is a gear and coupling driven by an electric motor to position the door. The coupling is a drive much like a square drive ratchet and socket made of plastic and often cracks allowing the drive to turn without changing the door position. I've heard you can drill through the outer housing and put a screw in the door through the drive gear, but you would have to know your way around this area well.
I repaired mine by replacing the blend door, a big job at best. The entire dashboard must come out to access the top of the heater core housing which must be removed.

Posted on Oct 12, 2008

  • 39 Answers

SOURCE: low heat coming from heater

heater core may be clogged. disconnect the hoses. CUT THEM OFF THE HEATER CORE!!!! If you pull them you may damage the solder joints at the tubes causing a leak. Them connect a garden hose and flush one way then another till water runs clear.

Posted on Nov 18, 2008

  • 1392 Answers

SOURCE: switch for blower motor for heat & ac

Sounds like you need a blower motor resistor. It has bad paths between the 1 and 2 speed circuits.

Posted on Jun 02, 2009

  • 462 Answers

SOURCE: drivers side ac switches to heat


Posted on Jun 16, 2009

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1 Answer

Why am I getting cool air conditioned air out of drivers side, and hot air out of passenger side (want cool ac on passenger side also).

There are 2possibles ,1. The heat / cool slide control is defective, it is not possible to repair. Most likely the servo motor that opens and closes the air vent that gives you heat or cool is stuck. Open your glove box and you will see 2 rubber tabs that hold the door at the open and down position. Push down on your glove box door until it swings all the way down (this wil be past normal open) up inside you will see a metal rod affixed to a arm that pivots via the servo left is full vent(cool) right is full heat. Push your hot/cold heat selector and see if it moves. It may not be moving its full extension. If your not sure push it right and you should get heat push it left and you should get cool check YouTube this is a common problem for this era of Buicks, good luck Bret

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With the AC, I wouldn't get in a hurry. You can rack up alot of money real quick trying to solve an intermittent problem with an AC system and not solve the problem at all. Be patient, and wait til the problem area goes completely, then you will know exactly what to replace.

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1 Answer

Mour 2001 suburban heat gets stuck on hot air when we try to switch it back to cool

There is a servo motor that runs the temp and a seperate one runs the mode doors. Start the vehicle,change the temp setting and listen for a popping sound coming from under dash. This
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Jan 28, 2011 | 2001 Chevrolet Suburban

1 Answer

2004 dodge ram AC clicking

There is what is called a "blend door" that controls the flow of air to either the heater core for heat or the evaporator core for cold. It switches back and forth via the temp you request. The servo motor that controls this may eithere have gone bad or the the door could be in a bind. This involves getting to the top or sides of the plenum which air flows through. Removing the glove box door and compartment will assist in accessing this. I hope this helps

Jul 15, 2010 | 2005 Dodge Ram 2500 Truck

1 Answer

2004 Dodge Ram Ac cold on drivers side - hot on passenger. Have checked each servo that is accessible. What can cause the dual air problem.

Check for a bad left door actuator motor.Have you checked the freon,to see if it is low?If the freon is not low,a servo,or actuator motor is not working.They are hard to find some times.If it is a vacuum problem,try this,remove the ac control out of dash,and remove the vacuum plug from vacuum switch.Spray some silicone spray in the switch,and the vacuum plug.Then reattach the plug,do this while the ac is on,and engine running,so the spray will be sucked into the vacuum switch,and servos.I have fixed a lot of them like that,but use nothing but silicone spray.Let me know the out come.

Aug 30, 2009 | 2004 Dodge Ram 2500

2 Answers

Blower on ac doesn't blow hard enough. very cool air but volume is low. any suggestions?

there are several possibilities, it could be a servo switch or servo motor that actuates the doors inside the system it may be blowing half the air where it isn't needed, Try it in the recirculate mode w/o fresh air. If it sets under trees and has leaves under the hood at rear near wind wipers it can stop up your evaporator core thats what the fan blows across to cool the car.Most cars have no filter system from the air intake ie the cowl plenum and if it gets full of trash it can go right to the evap core.

Jun 21, 2009 | 2004 Mazda 6

1 Answer

2003 suzuki aerio sx climate control problem

you have two seperate blend boors in yous HVAC system the one for the passanger side sounds like it isn't actuating. it is controled by a servo motor this motor sounds like it needs to be replaced. Hope this helps you.

Jan 19, 2009 | 2003 Suzuki Aerio

1 Answer

AC temperature

Servo motor? I disagree. Actually, there are 3 servo motors in the vehicle; an air inlet servo, an air mix servo, and an air outlet servo. None of which control the temperature.
The AC temp is controlled by a thermister in the cooler box/eveporator unit under the dash.

Jul 10, 2008 | 2001 Toyota Tacoma

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