13
Page 13
LED Status
Control Status
Probable Cause
Service Procedure
None (LED not
on or flashing)
Electrical power not
present
Control power switch in "OFF"
position.
Supply voltage interrupted.
Turn Power On
One short flash
every four
seconds
Stand-by mode,
Thermostat is
satisfied (no faults)
Temperature demand is satisfied
(no call for heat)
Normal operation
One short flash
every two
seconds
Stand-by mode,
Sabbath mode (no
faults)
Temperature on Setback Control is
adjusted down to prevent burner
operation
Normal operation
Alternates
bright and dim
(heartbeat)
Thermostat calling
for heat (no fault)
Tank temperature below setpoint of
thermostat
Normal operation
Short flash once
every second
Weak pilot signal
on last call for heat
1. Unstable pilot
2. Pilot tube blocked or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at gas control
1. See Burner Inspection on page
15
2-4. See Pilot Inspection, Testing
and Replacement on page 17
Two flashes,
three second
pause
Pressure switch not
working - closed
position
1. Pressure switch tubing kinked or
blocked
2. Blocked pressure tap on switch
or blower
3. Faulty pressure switch
See Pressure Switch Testing and
Replacement on page 32
Three flashes,
three second
pause
Pressure switch or
temperature switch
not working - open
position
1. Vent blockage or improper vent
configuration
2. Pressure switch tubing kinked or
blocked
3. Faulty pressure switch
4. Blower not spinning up to speed
5. Damper (inside blower) not fully
opening
6. Faulty blower temperature switch
1. Verify cord sets are fully plugged
in
2. See Pressure Switch Testing and
Replacement on page 32
Four flashes,
three second
pause
Excessive tank
temperature,
system must be
reset
1. Temperature sensor out of
calibration
2. Faulty gas control
1. Test Gas Control & Temperature
Sensor
2. Replace gas control if necessary
Five flashes,
three second
pause
False pilot flame
present
Pilot valve stuck in open position
Replace gas control
Six flashes, one
flash, three
second pause
(Soft Lockout)
Failed to light pilot,
system resets after
(5) minutes
1. Unstable pilot
2. Pilot tube block or restricted
3. Oxidation build-up on pilot
electrode
4. Wire damage to pilot assembly or
bad connection at gas valve
1. See Burner Inspection on page
15
2-4. See Pilot Inspection, Testing
and Replacement on page 17
Observe the green LED on the water heater gas control. Status
codes are displayed with a 3 second pause before repeating.
Once the status code is known, check and repair the water
heater, as recommended in the table below.
Troubleshooting
