Io" Or "Sb" Code - Hayward H150FDN Troubleshooting Manual

7. Service LED ON: "IO" OR "SB" Code
"IO" OR
"SB" Code
38
Check display for
"IO" code
The "SB" code may
clear with a reset of
power, power cycle
YES
Is "IO" code
present?
NO
the heater
Replace
display/bezel/
keypad:
(See Pg. 20)
Replace ICB:
FDXLICB1930
Verify ignitor wiring is
not damaged and
plugged in securely
YES
Is ignitor wire
damaged?
NO
Replace ignitor:
FDXLIGN1930
Ohm ignitor, verify
YES
8-25 ohms (20°-
140°F), reading out
of range?
NO