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31
LCD CODE
For Optional
Display
GAS VALVE LED STATUS/PROBLEM PROBABLE CAUSE SOLUTION
None
Short flash once
every four seconds
IDLE (no call for heat,
no fault conditions)
Temperature setpoint achieved
and burner is off
No solution required
None
“Heartbeat”, alter-
nates bright/dim
Call For Heat (no fault
conditions)
Water temperature is below set-
point and burner is on
No solution required
12
One Flash, three
second pause
Low flame signal (con-
trol continues to oper-
ate)
Pilot tube restriction, carbon
buildup on electrode, pilot wire
damage or gas supply
1. Gas supply pressure is low
2. Low voltage supply
3. Pilot replacement
44
Two Flash, three
second pause.
Pressure switch failed
closed
Pressure switch tube blockage or
faulty pressure switch.
1. Pressure switch wiring incorrect
2. Replace pressure switch
46
Three Flash, three
second pause
Pressure switch failed
open.
Vent blockage or improper insalla-
tion, switch tube blockage, faulty
switch, blower improper operation
or temperature switch open
1. Pressure switch wiring incorrect
2. Replace pressure switch
3. Air intake or exhaust obstructed
4. Replace blower temperature switch
5. Replace blower
31
Four Flash, three
second pause
TCO limit lockout
Thermal well fault, gas control
fault or tank is not filled with
water
1. Reset valve and check for proper
valve cycling
2. Make sure tank is full of water
14
Five Flash, three
second pause
Flame out of sequence
Pilot or burner valve has failed
open
1. Replace gas valve control
11
Six-One Flash,
three second
pause
Failed trial for ignition
Insufficient gas supply, unstable
pilot, carbon buildup on electrode
or wire/pilot tube damage
1. Check gas supply
2. Replace pilot
45
Six-Two Flash,
three second
pause
Recycle limit - PS/limit
opened
Vent blockage or improper installa-
tion, switch tube blockage, faulty
switch, blower improper operation,
blower temperature switch open or
excessive wind at vent termination
1. Pressure switch wiring incorrect
2. Replace pressure switch
3. Air intake or exhaust obstructed
4. Replace blower temperature switch
5. Replace blower
6. Check for vent termination compli-
ance as stated in this manual
13
Six-Three Flash,
three second
pause
Recycle limit - flame
lost
Pilot tube restriction, low gas sup-
ply pressure, carbon buildup on
electrode, wire/pilot tube damage
or combustion air port blockage
1. Gas supply pressure is low
2. Jacket air holes obstructed
3. Pilot replacement
14
Six-Four Flash,
three second
pause
Soft Lockout - flame
out of sequence sensed
Valve stuck in open position 1. Replace gas valve control
47
Seven Flash, three
second pause
Flammable vapor sen-
sor lockout
Gasoline or other flammable gas
was detected near the appliance
or the sensor has failed
1. Verify no gasoline or flammable va-
pors are present
2. Reset control using ON/OFF switch
on the gas control valve
3. Replace the flammable vapor sensor
49
Eight-One Flash,
three second
pause
FVS fault detected
Flammable vapor sensor resis-
tance is out of range, wiring to FV
sensor is faulty or control is faulty
1. Replace FV sensor
2. Replace FV sensor wiring
3. Replace gas control valve
89
Eight-Two Flash,
three second
pause
Temperature sensor
fault detected
Thermal well fault
1. Check thermal well wiring connection
2. Replace thermal well
15
Eight-Three Flash,
three second
pause
Electronics fault de-
tected
Thermal well fault or gas control
fault
1. Replace gas control valve
2. Replace thermal well
93
Eight-Four Flash,
three second
pause
Valve fault detected
Gas control valve needs to be re-
set or has been damaged
1. Cycle power to gas control valve
2. Replace gas control valve
Customer Service Troubleshooting Tips Care and Cleaning Operating Instructions Installation Instructions Safety Instructions
CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
CAUTION: For your safety DO NOT attempt repair of gas piping, remote control, burners, vent connectors or other
safety devices. Refer repairs to qualified service personnel.
Gas Valve LED Codes
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