August
13,
2018 7036-187M
31
MT. VERNON AE INSERT
With proper installation, operation, and maintenance your appliance will provide years of trouble-free service. If you do
experience a problem, this troubleshooting guide will assist a qualified service person in the diagnosis of a problem and
the corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.
Error Message
Possible Cause
Corrective Action
Bad wall control or control board
3 wires have loose connections or installed wrong
Replace wall control or control board
Check connections
BAD TC DROP TUBE
(TC = Thermocouple)
Drop tube thermocouple is broken or leads are
reversed
Check connections
Replace thermocouple
BAD TC Fire pot
(TC = Thermocouple)
Fire pot thermocouple is broken or leads are reversed
Check connections
Replace thermocouple
SNAP DISC TRIPPED
Overheat sensor (snap disc #3) has tripped
Convection blower may need cleaning
Turn power off to appliance and manually reset snap disc then
turn power back on
Clean convection blower if needed
VACUUM SW ERROR
(SW = Switch)
Appliance and venting is dirty plugged
Vacuum switch is bad
Vacuum hose is plugged/disconnected
Clean appliance and venting to appliance
Check connections. Bypass vacuum with jumper wire, if runs,
switch is bad. Replace switch
Check vacuum hose
COMB BLOWER JAMMED
Combustion blower is blocked/jammed
Remove blockage
Replace blower if necessary
Must unplug appliance to clear error
AUGER JAMMED
Auger jammed, feed motor bad
Pull the feed system and inspect
Clear jam and Press Retry
MISSED IGNITION
Igniter bad or poor harness connection
Out of fuel or fuel is bridging in hopper
Faulty fire pot thermocouple connection has shorted.
Ash plugging the igniter slot in the fire pot bottom and
clear the slot
Check connections, if OK replace igniter
Break up bridging pellets. Refill hopper
Replace the thermocouple
Press Retry
Use cleaning tool or a spoon to scrape ash
MIN Fire pot TEMP
Out of fuel
Refill hopper
Add handful of pellets to fire pot to prime it
Press Retry
MAX DROP TUBE TEMP
Appliance in over-heat condition
Flame height set too high
Components may need cleaning
Confirm setting matches burning fuel
Adjust flame height
Clean the firebox, heat exchanger, convection blower, fire pot
and ash pan
CONV BLOWER JAMMED
Convection blower blocked/jammed
Remove blockage
Replace blower if necessary
Must unplug appliance to clear error
CHECK ASH PAN
Auto-clean jammed
Auto-clean switch is bad
Linkage has become disconnected
If ash pan is empty, check for a jam. Use a screw driver and
firmly push in the fire pot floor holes and flex spring and push
toward home to release jam
Replace switch
Reconnect linkage
SCREEN GOES BLANK
Static discharge or nearby lightning or
Electric fast transients at the input mains
Wait 25 seconds and press any key to refresh the screen.
Hopper lid not closed all the way
Switch is out of adjustment (auger will not function)
Close the lid. If that didn’t work replace the switch
Adjust or replace switch
Firebox door is not latched properly
Adjust or replace door switch
Out of fuel
Check the fuel level, if OK the switch may be out, replace
switch
5
Troubleshooting Guide
