Hf" Code - Hayward H150FDN Troubleshooting Manual

10. Service LED ON: "HF" Code

"HF" Code

jump to section that
best describes error
Please refer to (pg. 20)
44
Power cycle the
heater at the
breaker
YES
Does heater
fire?
NO
YES
Did the "HF"
code reappear?
NO
Verify error code &
Replace gas valve:
Reduce the
temperature set
point until heater
stop firing
Problem
solved
YES
Is 24VAC
present?
NO
Do you have
manifold gas
pressure?
NO
Did the "HF"
code reappear?
NO
Toggle the
mode button
and call for heat
Test for 24VAC
off the gas valve
Replace ICB:
FDXLICB1930
YES
YES