Turn the ignition switch ON.
Manually operate the control switch and measure the voltage of blower motor.
Select the control switch to raise voltage until high speed.
Fan Speed | Motor Voltage |
1 | 3.75~4.5 ± 0.5V |
2 | 4.75~5.59 ± 0.5V |
3 | 5.87~6.71 ± 0.5V |
4 | 6.99~7.83 ± 0.5V |
5 | 8.11~8.95 ± 0.5V |
6 | 9.23~10.35 ± 0.5V |
7 | 10.63~11.75 ± 0.5V |
8 | Battery Voltage |
*AUTO COOLING: Auto speed (4.5V~B+)
*AUTO HEATING: Auto speed (4.5V~10.5V)
. If the measured voltage is not specification, substitute with a known-good power mosfet and check for proper operation.
If the problem is corrected, replace the power mosfet.