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Error
Code
Error Code Description
Possible Remedies
Recover
methods
35
Venting (Exhaust) Sensor
Open or Short
This Error Code will go away when exhaust temperature decreases.
If Error happens again:
1. Check Venting (exhaust) temperature sensor. Ensure connections are secure.
2. Check sensor resistance. If resistance is zero, replace the sensor.
3. Check vent pipes for blockage.
4. If the problem persists, replace the main control
Soft Lock
36
Abnormal Supply Voltage
Supply voltage is too low to operate. This Error Code will go away when supply
voltage returns to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the
requirements on the rating plate.
2. If problem persists, replace the main control
Soft Lock
37
Abnormal Supply Frequency
Supply frequency is too high to operate. This Error Code will go away when
supply frequency returns to normal operating range.
If Error happens again:
1. Ensure appliance is properly wired to a power source meeting the
requirements on the rating plate.
2. If problem persists, replace the main control.
Soft Lock
38
Error Appears When Control
Stores Data, but Data is not
Saved
Press the Power button to clear the Error Code.
Replace the main control.
Hard Lock
40
Gas Leakage is Detected for
Greater than 5 seconds, or
three times within 10 minutes
IMPORTANT: If you smell gas, STOP! Follow the instructions on page 2, this
manual, and call a qualified service technician or the fuel gas utility.
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the appliance cover. Ensure it is secure.
2. Check gas connections for leakage with a soapy solution. Fix any leaks.
3. Check condition of the burner assembly.
4. If the problem persists, replace the main control.
Hard Lock
41
Fan Speed too High with
Flame On
Press the Power button to clear the Error Code.
If Error happens again:
1. Check the vent connections for blockages.
2. Check the burner assembly.
3. Check fan operation. If fan appears to be operating normally but RPMs are too
high, replace the fan.
4. If the problem persists, replace the main control.
Hard Lock
42
LWCO Jumper Wire
Press the Power button to clear the Error Code.
If Error happens again:
1. Ensure the LWCO jumper wire is properly connected.
2. If the problem persists, replace the main control.
Soft Lock
43
Burner Overheat Switch
Open
Press the Power button to clear the Error Code.
If Error happens again:
1. Check burner overheat switch connections. Ensure connections are secure.
2. Check switch resistance. If resistance is zero, replace the switch.
3. If the problem persists, replace the main control.
Hard Lock
44
Air Pressure Sensor (APS)
Fault
Press the power button to reset
If error happens again:
1. Check the vent pipe for blockages.
2. Check the vent pipe for blockages.
3. If error do not clear, replace the APS
4. If the problem persists, replace the main control.
Hard Lock
45
Air Pressure Sensor (APS)
Open
Check the aps connection.
1.If APS is closed and connections are secure, check APS connection.
2. If the problem is not happen, replace the APS
3. If the problem persists, replace the main control.
Soft Lock
61
Fan Speed Feedback Signal
Abnormal
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check the connections to the fan. Ensure all are secure.
2. If the fan does not rotate during the ignition sequence, check for AC8V~26.5V
power at the fan connection. If AC8V~26.5V power is present at the control,
replace the fan. If the blower does not have AC8V~26.5V power, check power at
the control. If AC8V~26.5V power is not present at the control, replace the control.
3. If the problem persists, replace the main control.
Soft Lock
