Afr Rod - A.O. Smith 240 T-H3J Service Manual

10-6. AFR rod

Part #
Function
Failure events
Effects on the water heater
if AFR rod fails
Error codes when
the AFR rod fails
Diagnostic
Color / Number of wires
The flame rod is assembled with the AFR rod.
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
will display.
code will display.
101
Yellow - AFR rod
(Between the AFR rod and
the computer board)
Detecting elements
Black mark
27
Page
CONFIDENTIAL
Unit Part#
391
(During operation) Check
point
3/4" (19.5 mm)
Ver. 1.00
#108
991
I