Fan Speed 3 & 4 only works, Resistor?

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S20Workstation4

Well-Known Member
Joined
Dec 22, 2022
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Location
Hyde Park, NY
Hello Everyone,

Today, I noticed that the front blower only works on fan speed 3 & 4. I have a 2010 Ford Expedition EL, XLT. Basic HVAC dials, no seat heaters or automatic control system.

Could this be the blower motor resistor? I understand that it usually only works on Fan Speed 4 when it goes bad, but could it still possibly affect Fan speed 3? Any help would be appreciated. Thank you.
 
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