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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.
What else can I help you with?
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 your fan only work on high?
the blower motor resistor is bad or the connector going to it
Why does heater fan only work on high 98 ford expidition?
The fan control module in the engine compartment has gone bad.
Why does your car fan only work on high?
the blower motor resistor is bad or the connector going to it
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 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 blower fan only work on high on 1994 Nissan pickup?
Bad resistor or a malfunction in the switch.
Why does the blower fan only work on high in a 2006 Chrysler Sebring?
blower motor resistor needs to be replaced
Why would the fan controls in a 1986 Pontiac Sunfire only work on high?
Defective Heater Resistor Pack.
