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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.
What else can I help you with?
Why would the fan controls in a 1986 Pontiac Sunfire only work on high?
Defective Heater Resistor Pack.
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 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 would the heaterAC fan only work at high speed not medium or low on 1998 Chevrolet Cavalier Z24?
Blower motor resistor...around $25 on eBay
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.
