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© 2021 United States Stove Company
19
TROUBLESHOOTING GUIDE
PROBLEM CAUSE: Too rich air/fuel mixture
Orange, lazy flame, excessive fuel
build-up in the burnpot.
Clean out the burnpot
Make sure the cleanouts on each side of the damper are closed completely.
Not enough combustion air. Adjust the air damper to a more open position.
Make sure that the viewing door is closed and sealed properly. If not, adjust the
door catch or replace the gasket.
Check that all outside connections are clear of any obstructions.
Check the exhaust system, clean as needed.
PROBLEM Cause: Burnpot out of fuel
Fire goes out or heater shuts down
Hopper is empty, refill the hopper
Loss of draft pressure. Make sure the viewing door is closed and sealed
properly. Check the outside connections for any obstructions. Check the
exhaust system; clean as needed.
Check that the pressure switch connection to the firebox is free of ashes or
clear of any obstructions.
Auger system may be jammed or there is a “bridging” of fuel in the hopper
preventing fuel flow into the auger feed system.
Too much combustion air. Adjust damper to a more closed position.
PROBLEM Cause: Auto-Start Igniter fails to ignite the fuel in the burnpot.
Heater does not start a fire when the
“ON” button is pressed.
Check the pellets quality. If moist or damp, replace with dryer fuel.
Check that the auto-start igniter port is not blocked with ash or soot. (The
igniter is located behind the burnpot.)
The auto-start igniter should glow on start-up. If you can not visible see the
igniter glowing, then it may need to be replaced or there is a problem with the
electrical system. Check wiring.
Loss of draft pressure. Make sure the viewing door is closed and sealed
properly. Check the outside connections for any obstructions. Check the
exhaust system; clean as needed.
PROBLEM Cause: Not enough combustion air or fuel has too much moisture.
Viewing glass becomes black shortly
after start-up.
Adjust the air damper to a more open position.
Use a fuel with less moisture content.
PROBLEM Cause: Not enough combustion air or fuel has too much moisture.
• Disconnect the power supply before performing any maintenance! NOTE: Turning the heater to “OFF” does not
disconnect the power to all of the electrical components of the heater.
• Never try to repair or replace any part of the heater unless instructions for doing so are given in this manual. All other
work should be done by a trained technician.
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