Exhaust Thermistor - A.O. Smith 240 T-H3J Service Manual

CONFIDENTIAL
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00

10-13. Exhaust thermistor

Part# Unit Part# #718
Function
Failure events
Effects on the water heater
if exhaust thermistor fails
Error codes when exhaust
341 (Direct Vent Indoor models only)
thermistor fails
impeller.
Diagnostic
Check
Color / Number of wires White - White K1
point
values)
Black
Resistance values of thermistors as a function of temperature
37
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