07-31-2020, 07:17 AM
I am just thinking out loud here. All of the DC fan motors I have played with, adjust their speed by running the voltage through a resistor to vary the voltage to the motor. DC motor turns faster with higher voltage.
The fact that the motor turns may be saying this is not a motor problem.
Without seeing your setup, I can’t tell you how to do this. But I would run a quick diagnostic if I could. If you can access the two wires that lead to the motor, hot wire them to 12 VDC, and see if you get high speed. If so, then the motor is good, and you shouldn’t take the coach apart to remove it. If the motor spins at high speed with direct feed of 12VDC then the problem is not the motor.
One caveat to all this thinking is that in recent years, manufacturers have used PWM, pulse width modulation, to give infinitely fine control of DC motor speeds. PWM essentially turns the voltage on and off very quickly. I doubt you have a PWM control.
The fact that the motor turns may be saying this is not a motor problem.
Without seeing your setup, I can’t tell you how to do this. But I would run a quick diagnostic if I could. If you can access the two wires that lead to the motor, hot wire them to 12 VDC, and see if you get high speed. If so, then the motor is good, and you shouldn’t take the coach apart to remove it. If the motor spins at high speed with direct feed of 12VDC then the problem is not the motor.
One caveat to all this thinking is that in recent years, manufacturers have used PWM, pulse width modulation, to give infinitely fine control of DC motor speeds. PWM essentially turns the voltage on and off very quickly. I doubt you have a PWM control.
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home
)