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HIGH LIMIT SWITCH KEEPS TRIPPING
Possible Causes
The convection blower is overheating and
tripping the internal temperature shutoff.
The stove is being left on the highest setting
for extended periods of time.
Fuel other than wood pellets is being burned
in the stove.
Power surge or brown out situation.
High limit switch is malfunctioning.
STOVE WILL NOT FEED PELLETS, BUT FUEL FEED LIGHT COMES ON AS DESIGNED
Possible Causes
High limit switch has tripped or is
defective.
Bad Auger Motor.
Auger Jam.
Loose wire or connector.
Bad control board.
© 2024 United States Stove Company
TROUBLE SHOOTING GUIDE
Possible Remedies: (Unplug stove first when possible)
Clean any dust off of the windings and fan blades. If oiling the blower
does not help, the blower may be bad.
If operating the heater on the highest heat setting, the room
temperature could increase enough and lead to potential overheating
situations. If this happens, try operating at a lower heat setting.
This pellet stove is designed and tested to use wood pellets. Check
for signs of fuel other than wood pellets. No other types of fuel have
been approved for this pellet stove. If there are signs of other types
of fuel being used, stop using them immediately.
A power surge, spike, or voltage drop could cause the high limit
switch to trip. Check to see if a surge protector is being used on the
stove. If not, recommend one to the consumer.
If the other items check out OK, replace the high limit switch.
Possible Remedies: (Unplug stove first when possible)
Wait for the stove to cool for about 30 - 45 minutes. Locate the High Limit
thermodisc and press the reset button on the back of it. If the heater will
not restart, check the thermodisc to see if it's bad. To test if the thermodisc
is bad, you can bypass it as described previously for the POF thermodisc.
Remove the auger motor from the auger shaft and try to run the unit. If the
motor will turn the shaft is jammed on something. If the motor will not turn,
the motor is bad.
Start by emptying the hopper. Then remove the auger motor by removing
the auger pin. Remove the auger shaft inspection plate in the hopper so
that you can see the auger shaft. Gently lift the auger shaft straight up so
that the end of the auger shaft comes up out of the bottom auger bushing.
Next, remove the two nuts that hold the top auger biscuit in. Then rotate
the bottom end of the auger shaft up towards you until you can lift the
shaft out of the stove. After you have removed the shaft, inspect it for bent
flights, burrs, or broken welds. Remove any foreign material that might
have caused the jam. Also, check the auger tube for signs of damage such
as burrs, rough spots, or grooves cut into the metal that could have caused
a jam.
Check all wires and connectors that connector to the auger motor, high
limit switch, and the Molex connector.
If the fuse is good, the wires and connectors check out good, and the high
limit switch did not trip, test for power going to the auger motor. If there is
not a full current going to the auger motor when the fuel feed light is on, you
have a bad control board.
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