Question about 1997 Ford Thunderbird LX

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Heater blower won't turn off

Whenever the key is in the on position the heater blower run's at full speed and won't turn off with the switch, only turn's off when the key is in the off position. The only way to run the car is to remove the fuse for the heater.

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  • Anonymous Dec 16, 2008

    2004 Ford Explorer: heater blower motor runs at full speed and will not turn off unless vehicle is shut off

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  • nyssababe Jan 19, 2009

    i have the same problem in my peugeot 205. how can i fix this.

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  • 111 Answers

Most likely a blower resister which should be located under the passenger compartment

Posted on Nov 28, 2008

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I have a 2005 hyundai elantra heat blows cold air i changed thermostate and radiaor and blew out the heater core any sugestions


check to make sure the blend door is changing from cold to hot. With the engine off and the key in the run position set the blower motor to the highest speed. Turn the temp dial to full cold and wait 30 seconds. Now turn the temp dial to full hot a listen carefully. You should hear a difference in sounds as the blend door sweeps through its full range.

If it is working and the engine is fully warmed up feel the heater hoses where the pass through the fire wall. One should be very hot and the other should be pretty warm. If one is hot and one is significantly cooler than either the heater core is plugged or there is air in the heater core causing a block in flow.

Jan 07, 2016 | Hyundai Cars & Trucks

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Heater fan runs on high all the time unless key switch is turned to off position.


Even with the mode switch in off position? The mode switch is tied into the circuit for the heater speed control switch.

Other than that, I don't know. Are you sure you replaced the right relay, the blower motor relay?

Oct 14, 2015 | 2001 Jeep Cherokee

1 Answer

My heater won't turn on and has power to it


If blower motor has power but won"t run, blower may be faulty or the thermostatic switch maybe bad. If the thermostatic switch is bad, the blower may have 1 speed or in your case, no speeds at all. The thermostatic switch is usually located on top of,or on the heater box or housing if you will, most often times close to the blower. Will have a plug with multiple wires going to it.

Apr 26, 2015 | Cars & Trucks

1 Answer

Heater blower won't turn off. Even when key is removed.


I would check ur blower resistor by the blower, idk if u had other problems before this like the blower only working on certain speeds but, but your problem could be the ignition switch and cylinder could be the contacts are keeping in run position

Mar 10, 2015 | 2005 Pontiac Grand Prix

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Trouble shot heater switch and blower moter


You don't give much info, so it's hard to give you a good answer. Do you have power up to the heater switch and after turning the heater switch to the on position do you have power to the blower? Did you check the fuses, do you have power on both sides of the fuse? if you do follow that wire and check for power at the other end of it. Some cars have a temperature sensor and the blower will not come on until the temp. is warm enough so that the blower will not blow cold air. If you track the hot lead from the fuse box to the switch, through the switch and to the blower and at any point find you no longer have power, that would be the component I would think is causing your problem. You can also check the blower by running a test lead from the positive side of the battery to the blower motor and see if it runs.

Nov 29, 2014 | 2004 Dodge Ram 3500 Truck

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Ac fan switch won't turn on fan motor, was at one point just not turning on position 4 but now none will activate the fan motor


This is very common, this sounds like the blower resistor went bad, the blower resistor is what controls the fan speeds, the is located on the heater box next to the blowermotor, its held in with two screws and slides into heater box, lets see if i can send you a photo of the blower resistor to help you locate it.johnjohn2_107.jpg

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The heater/ac fan only works on speed settings 4 & 5


you might check your switch sounds like to me that your two lower speed sides of the switch maybe burnwed out.

Dec 19, 2009 | 2002 Chevrolet TrailBlazer

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Heater fan only blows air in the highest "on" position


Well it sounds like the blower motor relay is out you might also need a blower motor if it is using to much juice on high speed then the blower motor is probabley about to go out and with the noise you are describing it sounds like a bearing in the blower motor is about to go out so probabley should change the blower motor and the blower motor relay.

Dec 16, 2009 | 1999 Toyota Camry

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Heater fan wont shut off when ignition is turned off.


Should have a blower control unit. Sometinmes these are known to leave the blower running on low speed with the key off.

Oct 13, 2009 | 2003 GMC Envoy

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Replacing heater blower motor


this is not a problem with thw switch or motor. There is a resistor that is mounted inside the dash on the pasenger side that controls the speed of the blwer..these have a tendency to burn up after 10 years or so... replace the resistor, and you will be fine!  http://cgi.ebay.com/ebaymotors/Toyota-Truck-A-C-Heater-Fan-Resistor_W0QQcmdZViewItemQQcategoryZ33548QQihZ016QQitemZ260344846266QQrdZ1QQsspagenameZWDVW#ht_500wt_1230

Dec 23, 2008 | 1984 Toyota Pickup Deluxe

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