Error Codes - A.O. Smith GAS WATER HEATER User Manual

Error Codes

Fault
Ignition failure
Flame failure
CO is out of limits*
Fan fault
Flame sensor fault
High temp. limit fault
CO sensor fault*
* when connected to A. O. Smith CO detector.
Example for Heating light flashes:
For Flame failure the Heating light flashes 2 times.
Light Flashes
2 times
.5 Sec 1 Sec 1.5 Sec
M
i n
M
a x
Code
Heating LED light flashes 1 time
Heating LED light flashes 2 times
Heating LED light flashes 4 times
Heating LED light flashes 5 times
Heating LED light flashes 8 times
Heating LED light flashes 9 times
Heating LED light flashes 10 times
Interval
2 Seconds
2 Sec
14
Light Flashes
2 times
.5 Sec 1 Sec 1.5 Sec 2 Sec