Lo" Code - Hayward H150FDN Troubleshooting Manual

11. Service LED ON: "LO" Code

"LO" Code

YES
Go to
section B
(next page)
YES
Does exhaust
YES
gas limit have
continuity?
NO
46
YES
Verify adequate
water flow, is
flow sufficient?
NO
Increase flow
rate/clean filter
Is this heater
installed
indoors?
NO
YES
Heater made
after Feb.
2016?
NO
(908) 355-7995
Replace exhaust
gas limit switch:
FDXLEGL1930
YES
Is water pressure
switch wiring free of
damage?
NO
Replace wire
harness:
FDXLWHA1930
Verify high
limit wires
are free of
damage
Are wires free
of damage?
NO
Contact
Support
Check continuity of
YES
water pressure
switch, is continuity
present?
NO
Replace water
pressure switch:
FDXLWPS1930
Adjust switch
if necessary
YES
Did error
clear?
NO
Replace high
Problem
limits kit:
solved
FDXLHLI1930