| Problem |
Possible Cause |
Solution |
| Exhaust fan comes on than shuts off |
Burner limit sensor not sensing flame |
Check to be sure all burners lighting, if yes replace sensor. |
| |
Too much back pressure in exhaust venting |
Check for blockage in exhaust venting or maximum length per installation instructions. |
| |
Combustion air pressure switch faulty. |
Tie together the brown and red wires coming off pressure switch. If the unit works then the pressure switch is bad. |
| |
Gas supply missing or shut off |
Be sure your gas supply is available. |
| LED light not on |
Incorrect connection of thermostat to board |
Use the W and the R terminals for hooking up a thermostat rated for 24 volts AC. Check for this 24 volts at terminals R and C. If missing replace transformer # 60025 |
| |
No power. |
Be sure you have 110VAC to heater. |
| |
Power OK |
Bad circuit board, replace |
| Blower Fan runs but no heat |
Wrong connection of thermostat
|
The connection on the terminal strip marked G is for blower only use the W and R terminals
|
| |
Circuit board damaged |
Replace |
| Blower and exhaust motors running but no heat |
One or all of the limit sensors activated |
Check each one individually and reset or replace bad one |
| |
Circuit board damaged |
Replace |
