Intermittent Fault
Check the electrical terminals on the combustion fan and the control module connector. Check for contact resistance and oxidation.
Check the cable between control module terminal #10 and the signal terminal for the combustion fan (the black lead from the fan). Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground.
Check the cable between control module terminal #11 and the voltage terminal for the combustion fan (the red cable from the fan). Check for an intermittent open-circuit.
Remedy as necessary.
Other information:
- To access the control module or connect the breakout box, see CONNECTING THE BREAKOUT BOX
- To access the combustion fan, see FUEL INJECTION NOZZLE / FAN MOTOR / PRESSURE EQUALIZER, REPLACING
- For other values, see SIGNAL SPECIFICATION
- see CHECKING WIRING AND TERMINALS .
- Continue
Refer to INFORMATION
OKAY: Troubleshooting has been completed.