Gas Valve LED Codes
LCD CODE
GAS VALVE LED STATUS/PROBLEM
For Optional
Display
Short flash once
None
every four seconds
"Heartbeat", alter-
None
nates bright/dim
One Flash, three
12
second pause
Two Flash, three
44
second pause.
Three Flash, three
46
second pause
Four Flash, three
31
second pause
Five Flash, three
14
second pause
Six-One Flash,
11
three second
pause
Six-Two Flash,
45
three second
pause
Six-Three Flash,
13
three second
pause
Six-Four Flash,
14
three second
pause
Seven Flash, three
47
second pause
Eight-One Flash,
49
three second
pause
Eight-Two Flash,
89
three second
pause
Eight-Three Flash,
15
three second
pause
Eight-Four Flash,
93
three second
pause
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.
IDLE (no call for heat,
Temperature setpoint achieved
no fault conditions)
and burner is off
Call For Heat (no fault
Water temperature is below set-
conditions)
point and burner is on
Low flame signal (con-
Pilot tube restriction, carbon
trol continues to oper-
buildup on electrode, pilot wire
ate)
damage or gas supply
Pressure switch failed
Pressure switch tube blockage or
closed
faulty pressure switch.
Vent blockage or improper insalla-
Pressure switch failed
tion, switch tube blockage, faulty
open.
switch, blower improper operation
or temperature switch open
Thermal well fault, gas control
TCO limit lockout
fault or tank is not filled with
water
Pilot or burner valve has failed
Flame out of sequence
open
Insufficient gas supply, unstable
Failed trial for ignition
pilot, carbon buildup on electrode
or wire/pilot tube damage
Vent blockage or improper installa-
tion, switch tube blockage, faulty
Recycle limit - PS/limit
switch, blower improper operation,
opened
blower temperature switch open or
excessive wind at vent termination
Pilot tube restriction, low gas sup-
Recycle limit - flame
ply pressure, carbon buildup on
lost
electrode, wire/pilot tube damage
or combustion air port blockage
Soft Lockout - flame
Valve stuck in open position
out of sequence sensed
Gasoline or other flammable gas
Flammable vapor sen-
was detected near the appliance
sor lockout
or the sensor has failed
Flammable vapor sensor resis-
FVS fault detected
tance is out of range, wiring to FV
sensor is faulty or control is faulty
Temperature sensor
Thermal well fault
fault detected
Electronics fault de-
Thermal well fault or gas control
tected
fault
Gas control valve needs to be re-
Valve fault detected
set or has been damaged
PROBABLE CAUSE
SOLUTION
No solution required
No solution required
1. Gas supply pressure is low
2. Low voltage supply
3. Pilot replacement
1. Pressure switch wiring incorrect
2. Replace pressure switch
1. Pressure switch wiring incorrect
2. Replace pressure switch
3. Air intake or exhaust obstructed
4. Replace blower temperature switch
5. Replace blower
1. Reset valve and check for proper
valve cycling
2. Make sure tank is full of water
1. Replace gas valve control
1. Check gas supply
2. Replace pilot
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
1. Gas supply pressure is low
2. Jacket air holes obstructed
3. Pilot replacement
1. Replace gas valve control
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
1. Replace FV sensor
2. Replace FV sensor wiring
3. Replace gas control valve
1. Check thermal well wiring connection
2. Replace thermal well
1. Replace gas control valve
2. Replace thermal well
1. Cycle power to gas control valve
2. Replace gas control valve
31
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