Question about 2000 GMC Jimmy

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Replace heater door control part # 52474810 - 2000 GMC Jimmy

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On the fire wall on the pasenger side, i belive u have to remove the heater motor to gain access to the door

Posted on Jun 06, 2010

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Posted on Jan 02, 2017

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Repair heater control in a 2000 chevy pick up


The best way to get an answer for this go onto Youtube and they usually have fixrs for everything. Between last year and this year I have saved myself thousands of dollars repairing stuff myself through youtube.

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You have a defective air temperature control blend door actuator or blend door is jammed due to heat warping. To replace the blend door requires the entire dash be removed form the car.

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Replace heater door actuator gmc envoy 2003


More than likely stepper motor that operates door is defective. Try tapping on module that controls the door. Dash control may be defective you need a DVM to check electrical power at these outlets, do not use 12 volt test light.

DVM: Digital Volt Meter

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94 dakota 4.5 heater blower stays on windshield


Not. It is operated by an electric motor. But your problem may not be limited to the temp blend door motor. We also had problems with something in the heater box called a secondary stratification door. It works together with the blend door itself. Sometimes it would get warped and start hanging up. The solution is to replace the door with a revised door. It is also possible that you have an electrical problem in the heater blend door motor control circuit.The air mix door is malfunctioning or the controls are disconnected and allowing too much outside air to enter the cab. Sometimes you can get at the controls from the outside of the heater but you may have to open the heater to repair the mix door. Many times when cores are replaced the person forgets to reconnect the mix controls or breaks the connection unwittingly

Oct 25, 2011 | 1994 Dodge Dakota Club Cab

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My heater doesn't seem to want to get hot. I have done a radiator flush with new antifreeze, changed the thermostat and it's still blowing out hot air.


If it's not blowing out hot air, the blend door may be the problem on the 1990 Isuzu Trooper.

Heater Water Control Valve REMOVAL & INSTALLATION On early models the heater control valve was part of the heater core inlet. To replace the control valve, remove the heater core as outlined in this section. Remove the control valve from the heater core, being careful not to damage the core. Use new gaskets when installing new valves. The remainder of the vehicles are not equipped with heater water control valves. They use heater unit doors to regulate the amount of heat entering the vehicle. --- I would check that both tubes running to the heater core are getting hot. If they are, then there is a blend door problem. If both tubes are not getting hot, the heater core is blocked somewhere or the heater control valve, if so equipped, is in need of replacement. Good luck on this repair. prev.gif next.gif

Oct 28, 2010 | 1990 Isuzu Trooper

2 Answers

I have no heat in my 1990 Colony Park but the air conditioning does work. I suspect the problem may be in a vacuum hose that controls a blend door. Am I on the right track? Thanks.


a common problem with this model,[to include crowm victoria and lincoln town car]with automatic climate control,that commonly gets overlooked,is the temperature selector bar on the control head breaks,not allowing the operator to slide the cable that it is connected to fully close the blend door under the dash,this blend door closes off the a.c. evaporator and opens the heater core door while sending a signal to the heater control valve to open at the same time. sending hot coolant thru the heater core for heat. this problem was so common that you may have to buy a new control head as the ones in salvage yards will also be broken.if the temp select bar does not slide smoothly and evenly across the control head and the button is missing or tries to come off while sliding or is missing and the lever tries to disappear behind the control head replace the control head.

Jan 05, 2010 | 1990 Mercury Grand Marquis

2 Answers

1996 crown victoria has no heat


the temp blend door may not be rotating from the a/c evaporator to the heater core opening.

Could be the motor on the blend door or the temp control knob.

Do you have manual a/c or electronic temp control?

If it's the a/c door electronic actuator motor, it's on top of the plenum. Have to remove the instrument panel for access.

Hope it's the temp knob on the control head.

top one is the circuit you are looking at
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Apr 23, 2009 | 1996 Ford Crown Victoria

1 Answer

Heat


You'll need to check some things to see where the problem is. See if the hoses to and from the heater core are hot, and your cooling system is full. If the heater core definately has hot coolant going thru it, then the problem is probably in the heater control system inside the car. I believe this car has an electric motor that controls a temp/blend door in the heater box. You'll need to see if it is moving the door. I have seen the doors break and the motor just spin. If the ac controller detects the motor is travelling too far, it will shut the motor off. Bat disconnect will fix this but you'd still have to replace the broken door. Depending on wether you have dual zone temp control, it may have 2 motors and 2 doors. One is directly behind the glove box easy to get at.The other, you don't won't to know, it's behind the heater box. Single zone motor should be behind the glove box. Lower glove box down, you can remove motor easily and feel the door's shaft. If it spins free the door is broken. Broken blend doors are common. Other possiblities are electical problems with the ac control or motors.

Oct 17, 2008 | 2004 Jeep Grand Cherokee

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