RG150T6N – White Rodgers Electronic Gas Control Troubleshooting Chart

Observe green 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
None (LED not on  or flashing) Indicates control is off. Main  and pilot burner are off. Gas valve is functioning normally. Gas valve is  not powered. Light pilot.
One flash every  four seconds Not an error. Indicates pilot is  lit and main burner is off. Gas valve is powered and waiting for the set  point knob to be turned to a water temperature  setting. If the set point knob is at desired setting,  the thermostat is satisfied.
One flash every  second Not an error. Indicates main  valve is open and main  

burner is lit.

Thermostat is calling for heat. Water heater  operating normally and is in heat cycle.
Solid ON Not an error. Indicates that  the control is in shutdown  mode. Set point knob was recently turned to “OFF”  position. Wait until LED goes out before  attempting to relight.
Two flashes and  three second  


Low thermopile voltage; main  burner not lit. Loose thermopile connections or weak pilot  flame.
Four flashes and  three second  


Temperature cut-out limit  reached causing shutdown. Excessive temperatures may have been  reached. Shut off the control and reduce the  water temperature. Thoroughly verify control  operation, replace if exceeding setpoint.
Five flashes and  three second  


Electronics, sensor, or gas  valve fault detected. Control may be wet or damaged. Verify all  connections are tight; if problem persists replace  the control.