Hayward HC Series User Manual

55
16. Service LED ON: “b2” Code
“b2” Code stands for “Gas valve sensed as “ON” error. If gas valve is powered when it should be off, the heater
will shut down and go into lock out. The blower will operate until error condition is corrected.
Power cycle heater, in an attempt to clear the “b2”
code. IF power cycling clears to the “b2” message
and the heater fires, drop the temperature to
suspend heating. IF “b2” reappears, go to step 16B.
Call for heat and test gas valve
Power cycle heater
With heater in standby mode, test for 24VAC on
the gas valve (black & white wires), IF 24VAC is
present, replace gas valve (pg. 25). Otherwise,
replace the ICB (pg. 25).
OFF
ON
Step 16BStep 16A
b 2

Hayward HC Series Specifications

General

Brand	Hayward
Model	HC Series
Category	Heater
Language	English