Observe colored LED indicator on gas control. Status flash codes are displayed with a three second pause before repeating. Check and repair the system as noted in the troubleshooting table below.
|LED Status||Control Status||Probable Cause||Service Procedure|
|None (LED not on or flashing)||Millivolt power is not present. Light pilot.||Gas valve is functioning
normally. Gas valve is not powered. Light pilot.
|If the pilot will not stay lit replace pilot assembly. If problem persists, replace gas control.|
|One flash every four seconds
|Not an error. Indicates pilot is lit and main burner is off.||The knob can be turned to a desired setpoint temperature.||Normal operation.|
|One flash every second
|Not an error. Indicates main valve is open and main burner is lit.||None. Control will automatically shut main burner off when water temperature reaches the setpoint temperature.||Normal operation.|
|Two flashes and three second
|Low thermopile voltage; main valve not turned on.||Check thermopile and its
connections. Check pilot flame.
|1. See Service Procedure IV 2. See Service Procedure II 3. See Service Procedure II|
|Four flashes and three second
pause (LED red)
|Temperature cut-out limit reached, causing shutdown.||Check the valves and the water temperature sensor. Reduce the water temperature setpoint. Verify control operation, replace if exceeding setpoint.||Replace gas control.|
|Five flashes and three second
pause (LED red)
|Electronics, sensor, or gas valve fault detected.||Check water temperature sensor and its connection for open circuits, shorts, or differences in resistance between the two sensor elements.||Replace gas control.|
|Not an error–indicates that the control is in OFF position.||None; wait until LED turns off if you want to restart system.||LED will go out and the control will function normally once the pilot is lit.|