RG150T6N – Honeywell V1 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 Service Procedure
None (LED not 

on or flashing) 

Pilot assembly is not lit.  Gas control is not 

powered. Light pilot.

If the pilot will not stay lit  replace pilot assembly. If  problem persists replace  gas control.
One flash and  

three second  

pause

1. If setpoint knob is in “PILOT” position then pilot flame is 

detected. Turn setpoint knob to desired setting. 

2. If the setpoint knob is  

already at the desired  

setting, the water heater is 

satisfied.

1. Gas control is  

powered and waiting  for setpoint knob to  

be turned to a water  temperature setting. 

2. Water heater is  

satisfied and  

operating normally.

Normal operation.
LED on  

continuously  

(solid)

Setpoint knob has been recently  turned to the “OFF” position. Wait  until LED goes out before  

attempting to relight.

Setpoint knob was  

turned to “OFF”  

position.

LED will go out and the  

control will function  

normally once the pilot is lit.

Two flashes  

and three  

second pause

Weak pilot signal detected.  System will reset when pilot  flame is sufficient. 1. Thermopile failure. 2. Unstable pilot. 

3. Pilot tube blocked or  restricted.

1. See Service Procedure IV 2. See Service Procedure II 3. See Service Procedure II
Three flashes  

and three  

second pause

Insufficient water heating.  

System will reset.

1. Thermal sensor out  of calibration. 

2. Faulty gas control.

Replace gas control.
LED Status  Control Status  Probable Cause Service Procedure
Four flashes  

and three  

second pause

Excessive tank temperature.  System must be reset. 1. Temperature sensor  out of calibration. 

2. Faulty gas control.

Replace gas control.
Five flashes  

and three  

second pause

Temperature sensor fault. 1. Damage to the  

temperature sensor, 

resistance is out of  

range, or sensor is  

unplugged. 

2. Faulty gas control.

1.See Service Procedure VI 2.Replace gas control.
Six flashes  

and three  

second pause

Water leak detected by  

accessory module.

Excessive amount of  water in drain pan/water  dam. 1. Check T&P valve. 

2. Check all water fittings. 3. Pressurize and leak test  tank.

Seven flashes  

and three  

second pause

Gas control electronic fault  detected. 1. Control needs to be  reset. 

2. Control is wet or  

physically damaged.

1. Reset gas control 

2. Replace gas control.

Eight flashes  

and three  

second pause

Standing pilot remains on  while setpoint knob is in  

“OFF” position.

Pilot valve stuck in  

open position. 

Replace gas control.

 

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