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Start here for directions to specific Troubleshooting Chart
Hazardous voltage. Can shock, burn
or kill. Disconnect power before servicing any
components.
Fire and Explosion hazard. Do not
jumper switch terminals to remedy a failed safety
switch.
Initial Troubleshooting
Only qualified, trained service technicians with appropriate test equipment should service the heater. Remember
that all parts of the system affect heater operation. Before starting this troubleshooting procedure, make sure that
the pump is running correctly, that there are no blockages in the system, that the valves are correctly set and that
the time clock is correctly set and is running.
Go to chart “HEATER WILL
NOT FIRE - A”
(Page 24)
Go to chart “HEATER WILL
NOT FIRE - B”
(Page 25)
Go to specific safety switch
troubleshooting chart
(Pages 28 and 29)
Go to chart ‘HEATER WILL
NOT FIRE -C”
(Page 26)
Are any red diagnos-
tic LED’s on back of
board (AGS, AFS,
SFS, HLS, PS or
THERMISTOR) “on”
NO
NO
NO
NO
NO
YES
YES
YES
NO
YES
YES
Does red “SERVICE
HEATER” LED come
“on”
Verify that water temperature setting is
above water temperature reading. If it is,
and heater either will not fire or no red
LED’s come “on”, replace Control Board.
YES
Is green “POOL” or “SPA”
LED “on”?
Is red “SERVICE SYSTEM”
LED “on”?
Is red “SERVICE HEATER”
LED “on”?
Turn off 120 VAC power to
heater for about 5 seconds,
and turn back on. Make sure
temperature setting is above
water temperature. Wait one
minute.
Do any diagnostic LED’s on
back of board (AGS, AFS,
SFS, HLS, PS, or
THERMISTOR) come “on”
and stay on?
NOTICE: Any or all of the diag-
nostic LED’s may come “on”
momentarily when you turn on
the power to the heater.