Bradford White U-TW4-75S-76R-3N - Manual (Page 19)

Page 19
LED Status Control Status Probable Cause Service Procedure
Eight flashes,
three flashes,
three second
pause
Thermal well sensor
damaged or un-
plugged or gas con-
trol electronics fault
detected
1. Damage to thermal well wires
2. Thermal well sensor resistance
out of range
3. Replace thermal well
4. Verify control is not wet or
physically damaged
5. Reset control on/off switch
6. Replace gas control if 8-3 error
persists
See Thermal Well Testing on
page 34
Eight flashes,
four flashes,
three second
pause
Gas control fault
detected
1. Verify control is not wet or
physically damaged
2. Reset control on/off switch
3. Replace gas control if 8-4 error
persists
1. Replace gas control if wet
or physically damaged
2. Cycle power
3. Replace gas control
Troubleshooting
19