Bradford White 100T-88B-3X - Manual (Page 4)

4
TROUBLESHOOTING CHART (CONTINUED)
LED Status Control Status Probable Cause
Two flashes and three
second pause.
Weak pilot flame
detected. System will
reset when pilot flame is
sufficient.
1. Unstable pilot.
2. Pilot tube blocked or
restricted.
Three flashes and three
second pause.
Insufficient water
heating. System will
reset. 1. Thermowell sensor out of
calibration.
2. Possible short.
Four flashes and three
second pause.
Excessive tank
temperature. System
must be reset. 1. Thermowell sensor out of
calibration.
2. Faulty gas valve.
Five flashes and three
second pause.
Thermostat well fault.
1. Damage to the thermowell
wire.
2. Thermowell sensor
resistance out of range.
3. Replace thermowell.
4. If
thermowell replacement
does not correct the
problem; Verify control is not
wet or physically damaged
5. Turn set point knob to "OFF"
position. Turn set point knob
to "PILOT" position and light
pilot.
6. Replace gas valve if five
flash error persists.
Seven flashes and three
second pause. Gas valve electronic fault
detected.
1. Verify control is not wet or
physically damaged.
2. Turn set point knob to "OFF"
position. Turn set point knob
to "PILOT" position and light
pilot.
3. Replace gas valve if seven
flash error persists.
Eight flashes and three
second pause
False pilot flame present.
1. Pilot valve stuck in open
position
2. Turn set point knob to "OFF"
position. Turn set point knob
to "PILOT" position and light
pilot.
3. Replace gas valve if eight
flash error persists.