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Troubleshooting
11. Light # 2 on Heat output bar flashing (Circuit Board).
(The Vacuum Switch contacts have opened for more than 15 sec.)
üPinch, break or blockage in Vacuum Hose - Check hose for pinch points or damage, replace or re-route
as required. Blow out Vacuum Hose
üBlocked Hose Barb on Exhaust Channel - Use a paper clip to clean out Hose Barb or remove the Vacuum
Hose from the Vacuum Switch and blow into the hose to remove blockage.
üBlocked exhaust / venting system - Have stove and venting cleaned and inspected.
üSevere negative pressure in area where unit is installed - Check the operation by opening a window,
does this solve the problem? If it does, install fresh air intake to unit or room. Venting system may
require vertical section to move termination into a low pressure zone.
üVacuum Switch failure - Bypass the vacuum switch, if this corrects the problem check for above
problems before replacing the Vacuum Switch.
üDamage to gray wires between Circuit Board and Vacuum Switch - Inspect wires and connectors
üCombustion Blower failure - The Combustion Blower is not turning fast enough to generate the proper
vacuum in the Exhaust Channel. Visual Check; is the blower motor turning? Check the Exhaust Blower
voltage across the blower wires (>=220V on #5 setting and >= 165V on #1 setting). – Replace the
Circuit Board if the Voltage reading is less than 165 V. with a line voltage >220 V AC.
üCheck Vacuum levels in the exhaust channel by bypassing the vacuum switch, then remove the Vacuum
hose from Vacuum Switch. Check exhaust vacuum readings by placing the open end of the Vacuum
Hose on a Magnahelic Gauge. (readings must be above .10” W.C. on low fire).
If the motor fails to reach a 0.10” W.C. readings, then replace the Combustion Blower
To reset Circuit Board after a trouble code - push the ON/OFF button
FUSES:
F1 is the fuse to the inside of the circuit board controls. If F1 has blown there may have been an input
power overload or a short in the convection fan.
F2 fuse closest fuse to the outside edge of the circuit board controls. If fuse F2 has blown then there
was a electrical overload problem with one of the following parts: ignitor, auger motor, high limit switch,
or exhaust blower.
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