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Blower fan will not run have no power to motor.

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  • kakima Dec 10, 2016

    Hi John malkmus, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

    What year, make, and model?

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Check the fuse in the fuse block, it should read htr fan

Posted on Dec 10, 2016

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2 Answers

2004 crown vic. only 63K miles on her. AC/heat fan was sporadically working, now its done. AC was nice and cold, working fine. Is the fan a hard replacement if I were to find one at a parts yard?


Try to check the power and ground on the blower fan. If you missing the ground on the blower fan connector than most likely it is the blower fan resistor (controller), it is located under the hood close to back firewall behind left cylinder head.

Aug 17, 2015 | 2004 Ford Crown Victoria

1 Answer

02 sunfire


If the 30amp blower fuse has power, and you can run power to the blower motor and it runs, I would say its the blower relay or the control switch on the dash. The control switch provides power to turn the blower relay on. The fan switch provides the ground circuit.

Feb 27, 2014 | Pontiac Sunfire Cars & Trucks

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2000 Ford E-250 appears to not be getting power to common blower relay terminal. Fan runs on all speeds when 12V is sent to blower motor. Why power loss to common relay terminal. IS there a way to ope


Not sure what a common relay terminal is.
The blower relay gets power from a 50amp fuse. Power goes to the blower motor and the resistor and speed switch provide the ground circuit. The on signal for the blower relay comes from the selector switch.

Jan 24, 2014 | Ford E250 Cars & Trucks

1 Answer

Heater won't go off


Hi,

If you're referring to the heater "FAN" running continuously, then its likely to be your blower motor resistor.

The heater blower motor (under the dash) has constant power supplied from the battery, but is controlled by the blower "resistor" - usually mounted on the blower motor assembly. If one or more of the blower resistor coil wires are faulty, the motor will either not work on one of the fan settings, or will constantly run by itself.

Jun 08, 2011 | 1984 Mercury Grand Marquis

1 Answer

Rear blower works but the front blower doesnt


They don't use anything in common except the controls and the engine coolant in the heater cores. The car is old enough that the blower fan motor is just worn out and needs a new one. I'd try turning it on and wrapping on the motor even a warn out one if vebrated might come on. The blower control module is a failing peice and is quite expensive. If it did fail tough is because the blower motor as it wears out draws more power and the fan blade itself accumulates dirt and makes the motor draw more to turn the heavier fan. I'd test for power and ground right at the motor. I'd also just run a wire to it and see if it'll run. With the key on thiers power to the motor though the blower relay and the controller turns on the ground. You might find that the powers their but the ground is'nt. Put a ground jumper to it and see it run and if and amp meter says it's drawing less that 10 Amps let it run for awhile and see if the Amo draw rises as the motor as it warms up may get tight and draw more power after it's had time to warm up. GM heater motors have been doing this for a long time and it's nothing new. The wire connectors are suspect everwhere theirs a connection as the connectors heat up over time and fail. Once the problem is corrected and you paid the big money( maybe) change the blower motor so it doesn't happen again soon.

Dec 22, 2010 | 2002 Cadillac Sts

1 Answer

The fan for the heater will not blow


make sure fan fuse is good, remove power wire going to blower motor then run a power wire to the blower motor from the battery install a an inline fuse in that wire from battery , if it runs with direct power then may be a resistor or switch, remove direct power wire reconnect orginal power wire to motor turn switch to blower on, use a test light see if you have power at motor with switch on, if theres power then motors no good, hope this helps.

Dec 07, 2009 | 1990 Ford Econoline

2 Answers

No air coming out of vents when air is turned on. the fuses are all ok


2 things come to mind: can you hear the fan turning?

if not check for power at fan location. If there is power and the fan isnt spinning replace the fan. If there is no power
there is a problem with the fan circuit which includes wiring fuse (you stated were ok) and Fan speed switch (might be a module)

Or there is a blockage it is possible for your heater core and evaporator to plug up with dust .

Oct 27, 2009 | 2006 Chrysler Town & Country

3 Answers

Subject: 2004 isuzu rodeo...my ac/heater blower is not working


The resistors are in circuit only on the lower fan speed settings.
On the highest speed setting, power is switched directly to the fan motor.
Check fan power supply fuses,
Check power is available to the fan when high speed selected.
If all above OK, apply power directly to the motor to verify fan motor runs- if it doesn't the motor may need replacement/repair.

Jul 29, 2009 | 2004 Isuzu Rodeo

1 Answer

Interior fan won't run to run A/C or heater. I


If blower only works on high speed I would say blower motor resistor but if it does not work at all I would suspect blower motor. Make sure you are getting power to motor if not it might be blower motor switch.

Jul 02, 2009 | 1998 Jeep Grand Cherokee

1 Answer

1997 honda passport heater fan motor doesn't work


check the fuses than check for power and ground at the blower motor plug with the engine running and the switch on high. if you have power and ground replace the blower motor. somtimes the blower motor resistor fails too but than the blower usually only works on high. I replaced 1 of each this week.

Dec 20, 2008 | 1998 Honda Passport

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