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HEATER BLOWER FAN SPEED FLUCTUATES WITHOUT ADJUSTMENT OF CONTROL BUTTONS

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Faulty blower motor resistor
short behind climate button array

Posted on Jan 12, 2009

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Posted on Jan 02, 2017

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How do I fix the air condition control buttons?


Hello,

Well, I can't tell by your explanation if the knob stem is broken & just spinning around or if it feels normal and nothing happens.

So, I guess I would first have you check all the fuses labeled "AC" or "Heater". Might be just a blown fuse, but remember, fuses always blow for a reason. There are many things that can be causing your problem like the heater/ac fan speed relay or a broken wire, etc.


I don't how auto repair savvy you are but, Google "Mazda 3 a/c panel". You will see many things on that first page like inexpensive replacement knobs, etc. There are even several YouTube videos on how to gain access to your ac/heater control panel. There is a wealth of information there. If you are not a do-it-yourselfer, you can at least look through there to educate yourself before you take your car to someone. Being informed ahead of time is very valuable.

Bestalucktoyou,
M

Nov 28, 2014 | 2006 Mazda 3

Tip

How To Replace AC Heater Blower Motor Fan Speed Control Resistor Accord 98-02...


How To Install Replace AC Heater Blower Motor Fan Speed Control Resistor Accord 98-02 1AAuto.com<br /><a href="http://www.1aauto.com/1A/ACCondenserFanAssemblies/Honda/Accord/-/-/2000?utm_source=fixya&utm_medium=forum&utm_campaign=1ATony"><br />This part is available on 1aauto.com</a><br /><br /><utube src="vRs1JJ42Eg0"><br />

on Jun 21, 2011 | Honda Accord Cars & Trucks

1 Answer

On a 2007 lincoln navigator the a/c fan motor will not shut off. the fan adjustment bars are showing slower but still the fan is on high


The fan speed reostat is broken or the switch itself is bad. Try replacing the switch first because the motor speed reostat is part of the motor itself. $$$

Aug 30, 2014 | 2007 Lincoln Navigator Luxury

1 Answer

Idle fluctuates on 1995 f250, sometimes dies, sometimes revs, no apparent vaccum issues, IAC with scan tool reads low voltage issue. Could this be vaccum, charging system, faulty computer? Problem is...


Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Nov 08, 2012 | 1995 Ford F250

1 Answer

Heater / air conditioner fan control doesn't engage fan. Previously, it only worked in high speed.


I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

Jul 16, 2012 | Cars & Trucks

1 Answer

Heater and airconditioner control on mercery grand marquis


If the fan will not run on ANY speed in your Grand Marquis, the problem is most likely NOT the control switch.

Check for power and ground at the blower motor connector. If power and ground is present, replace the blower motor. Otherwise, the problem is most likely a failed blower speed control module (VERY common). The blower motor speed controller is located in the A/C evaporator housing just below the heater hoses.

Note: It is also common for a bad blower motor to CAUSE the controller to go bad. You MAY have to replace BOTH.

May 17, 2012 | 2001 Mercury Grand Marquis

1 Answer

While ac on rpm fluctuates


You need to clean the engine throttle body and the automatic idle speed control motor, they are likely full of cylinder backwash deposits and this causes the problem. Use throttle body spray celaner form the auto parts store and after cleaning disconnect the battery for 5 minutes to reset the system.

May 04, 2012 | BMW Cars & Trucks

1 Answer

Heater blower motor.,Highspeed only works..problem??


9 out of 10 times its the heater fan resistor doing this. it has wires that corresponed to diffreent speed settings for heater fan. the resistor is beside the blower motor, Your Kia Sportage Blower Motor Resistor controls the heating equipment in the vehicle by opening and closing the fan motor. The Kia Sportage Blower Motor Resistor allows the heating and climate control system to control the speed of the vehicle's cooling fan. its under the passenger side glove box. undo 2 screws and disconnect the electrical connector. thats it!!

Jan 24, 2012 | 2000 Kia Sportage

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