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© 2022 United States Stove Company
Display is Flashing “E4”
Possible Causes
Possible Remedies: (Unplug stove first when possible)
The air inlet, burnpot, interior combustion air
chambers, combustion blower, or exhaust pipe
are blocked with ash or foreign material.
Follow all cleaning procedures in the maintenance section of the
owner’s manual.
The Proof of Fire (POF) thermodisc has came
unplugged
Check the (POF) thermodisc to see if the wires are connected
properly.
The Proof of Fire (POF) thermodisc has
malfunctioned.
Temporarily bypass the POF thermodisc by disconnecting the
two wires and connecting them with a short piece of wire. Then
plug the stove back up. If the stove comes on and works, you need
to replace the POF thermodisc. This is for testing only. DO NOT
LEAVE THE THERMODISC BYPASSED. Your blowers will never
shut off and if the fire went out the auger will continue to feed
pellets until the hopper is empty if you leave the POF thermodisc
bypassed.
The hopper is out of Pellets.
Refill the hopper.
The hopper safety switch has failed or hopper is
open.
When operating the unit, be sure the hopper lid is closed so that
the hopper safety switch will activate. Check the wires leading
from the hopper safety switch to the control panel and auger
motor for secure connections. Use a continuity tester to test the
hopper safety switch; replace if necessary.
The auger shaft is jammed.
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.
The auger motor has failed.
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.
