Mechanics

FAN WILL NOT BLOW ON HIGH. REPLACED THE RESISTOR BUT IT DID NOT SOLVE THE PROBLEM. WHAT NEXT?

1997 Lexus ES 300 • 126,000 miles

This is a great car but the Air is not blowing hard. What comes out is cold but the speed does not change on the blower. It will blow through every port, dash/defrost/floor but only on lower speed. Replaced the resistor as it looked as though it had been hot but it did not cure the problem.
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Slingdog6
November 13, 2011.



There is a linear control mechanism for the blower motor that controls fan speed.
You may also have a problem with the air vent mode control if it is blowing out all of the vents at once.
I am providning you with wiring diagrams of the entire A/C/Heater circuit.