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LED Status Control Status Probable Cause Service Procedure
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 20
2-4. See Pilot Inspection,
Testing and Replacement
on page 22
Six flashes,
two flashes,
three second
pause (Soft
Lockout)
Pressure switch or
blower temperature
switch opened
during burner
operation. System
resets after (5)
minutes
1. Vent blockage or improper
vent configuration
2. Pressure switch tubing kinked
or blocked
3. Faulty pressure switch
4. Vent termination being
affected by wind
5. Blower not spinning up to
speed
6. Blower temperature or
exhaust temperature too high
7. Faulty blower temperature
switch
1. Check vent or vent
tables
2-3. See Pressure Switch
Testing on page 25
4. Refer to venting section
of installation manual
5. See Blower Testing on
page 28
6-7. See Blower
Temperature Switch
Testing on page 31
Six flashes,
three
flashes,
three second
pause (Soft
Lockout)
Pilot flame
extinguished,
system auto 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 control
5. Insufficient combustion air
6. Insufficient
g
as
p
ressure
1. See Burner Inspection
on page 20
2-4. See Pilot Inspection,
Testing and Replacement
on page 22
5. Refer to Installation &
Operation Manual
Six flashes,
four flashes,
three second
pause
Undesired false
pilot flame sensed,
system auto resets
Pilot valve stuck in open position Replace gas control
Seven
flashes,
three second
pause
Flammable vapor
sensor or
resettable thermal
switch fault
detected, see
warning label
1. Flammable vapor present
2. Flammable vapor sensor
exposed to excessive moisture
3. Flammable vapor sensor
exposed to extreme ambient
temperature
4. Resettable thermal switch
o
p
en
See Flammable Vapor
Sensor Testing on page 40
Eight
flashes, one
flash, three
second
pause
Flammable vapor
sensor out of
specification,
possible short
1. Flammable vapor sensor out
of specification; verify Flammable
Vapor Sensor (FVS) resistance is
not below 25 k.
2. Possible short in flammable
vapor sensor or resettable
thermal switch wirin
g
See Flammable Vapor
Sensor Testing on page 40
Troubleshooting
18