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5-4
BURNERS DO
NOT LIGHT.
Verify that correct setpoint has
been programmed, that main gas
supply valve is open, and that
equipment gas valve is set to ON.
Press ON/OFF button.
Did burners
light?
Problem resolved.
Open control panel by
removing screws in
each upper corner.
Is HEAT LED
on interface board
illuminated?
Problem is with a
failed interface board or a
malfunctioning computer.
Call FASC.
Problem is with the gas
supply or ignition system.
Call FASC.
Use bottle brush to clean low
water sensor. If burners still do
not light, remove the cover over
the water sensors and thoroughly
clean them with a scouring pad.
Did burners
light?
Problem resolved.
No
No
No
Yes
Yes
Yes