To Next Page

To Previous Page

“IO” OR

“SB” Code

Check display for

“IO” code

Is “IO” code

present?

The “SB” code may

clear with a reset of

power, power cycle

the heater

YES

Verify ignitor wiring is

not damaged and

plugged in securely

7. Service LED ON: “IO” OR “SB” Code

Is ignitor wire

damaged?

Replace ignitor:

FDXLIGN1930

YES

Ohm ignitor, verify

8-25 ohms (20°-

140°F), reading out

of range?

YES

Replace ICB:

FDXLICB1930

Replace

display/bezel/

keypad:

(See Pg. 20)

Hayward H350FDN User Manual

Other manuals for Hayward H350FDN