Chevy Malibu
Heater Cores and Blower Fans
Ford Ranger XLT
Heating Ventilating and Air Conditioning

Why does a fan only work on high?

Top Answer
User Avatar
Wiki User
Answered 2012-03-22 02:29:47

More information would be needed to diagnose your problem more accurately, but here are some tips to start:

1) Fans will not work with dimmers. If you have a dimmer controlling your fan, it will only work when the dimmer in is the full intensity position (if at all). You will need to replace the dimmer with a fan speed control. If one switch controls both the fan and the light, this will not solve your problem, as a light will not work with a fan speed control switch. You will have to settle with a standard single pole switch, a remote switch, or get one more wire between the switch and the fan.

2) If you have a fan speed control switch, but the fan doesn't seem to respond as it should, you may want to pull on the pullchain directly on the fan. If the pullchain is not set to high, your speed control will not work correctly.

3) If #2 or #3 don't apply to you, and you are simply using the pull chain on the fan, you may have a bad switch inside the fan housing, loose or disconnected wires to the fan (unlikely), or simply a bad fan motor.

User Avatar

Your Answer


Still have questions?

Related Questions

Why does my 2004 trailblazer ac fan only work on high?

The 2004 Chevrolet trailblazer air conditioning fan switch has three settings. The switch can malfunction, and only work in the high setting.

Why does the fan work only on high and keep blowing resistors on low?

Had one that the fan motor was going bad Was burning out resistors with high draw

Why does your fan only work on high in a 2006 Chrysler Sebring?

blower motor resistor

Why does heater fan only work on high 98 ford expidition?

The fan control module in the engine compartment has gone bad.

Why does 2003 Avalanche fan work on everything except high Resistor or Relay?

If only high speed is effected check the high speed relay and/or the fan switch/electrical connections for problems.

Why does your car fan only work on high?

the blower motor resistor is bad or the connector going to it

Why does the fan switch only work on high ford van E350?

You need to replace your Blower relay,

Why does my heater fan only work on a high speed and how do I fix it?

try replacing the blower motor resistor

Why does the heat blower only work on low and medium but not on high?

the blower resistor controls the fan speeds

Why does blower fan only work on high on 1994 Nissan pickup?

Bad resistor or a malfunction in the switch.

Why would the fan controls in a 1986 Pontiac Sunfire only work on high?

Defective Heater Resistor Pack.

Why does the heater fan only work on high on a 2001 safari?

Check the low speed relay and the resistor at the motor

Why does the blower fan only work on high in a 2006 Chrysler Sebring?

blower motor resistor needs to be replaced

Why does heat fan on Toyota Solara only work on high?

You most likely have a bad blower motor resister.......

Why does heater fan on 95 silverado only work on high?

You most like have a bad blower motor resister.......

Why does blower only work on high only?

The switch is probably fine. The culprit is the resistor unit it is mounted in the air duct near the fan

Why does the heater on a 2003 Chevrolet Tracker only work on high speed?

do you mean the speed of the fan? if so, it'a relay generaly near the motor of the fan. If it's the heat who only came at high speed, you need to add some antifreeze.

Why does the heater blower only work on high?

from what i have read it is the blower motor resistor it goes bad and only lets the fan run on high google blower motor resistor and read on

Why does blower fan only work on high on Ford f150?

Blower Motor Resistor is bad. 20.00 part at AZ.

What does it mean if the blower fan in a 2001 Dodge Intrepid will only work on high speed?

replace the blower motor resistor

What might cause the heater and air conditioner on a 1999 Mercury Cougar to cease functioning?

If you mean the fan - replace the fan speed resistor if the fan only works on high speed. Please supply more information - no heat or cooling? Does fan work? Does mode switch work?

Why don't the heater fan work on high on my 1991 blazer S10?

Odds are you need a fan switch, It is very common for the high on GM fan switches to go out.

Why would an AC fan work only on high?

The fan switch is probably bad. My Ford Explorer did that, I had to have the switch replaced. This could also be caused by a bad blower motor resistor.

Why does my fan work only on high in my Honda Odyssey 2001?

It sounds like your blower fan resistor is not working correctly. Eventually it will stop working all together. I suggest that you get a replacement.

Why will only the high fan work on a 2005 Chevy trailblazer AC Why does only the highest setting on my ac fan on the 2005 Chevy trailblazer?

There is a fan motor resistor board located under the dash on top of the plastic duct housing on the passenger side of the vehicle. It is behind the glove box. Removing the glove box will help you to get to the resistor. The power to the fan motor uses various resistances on that board to get your lower fan speeds, but on the highest setting it bypasses the resistors since they are not needed. You always will get your blower motor to work but only on high only when the resistor board is bad.