United States Stove Company 5040 - Manual (Page 21)

19 TROUBLESHOOTING GUIDE
When your stove acts out of the ordinary, the first reaction is to call for help. This guide may save time and money by en-
abling you to solve simple problems yourself. Problems encountered are often the result of only five factors: 1) poor fuel;
2) poor operation or maintenance; 3) poor installation; 4) component failure; 5) factory defect. You can usually solve those
problems related to 1 and 2. Your dealer can solve problems relating to 3, 4 and 5. Refer to diagrams on page 20 to help
locate indicated parts.
For the sake of troubleshooting and using this guide to assist you, you should look at your heat level setting to see which
light is flashing.
** CAUTION – UNPLUG THE STOVE FROM ALL POWER PRIOR TO ATTEMPTING TO SERVICE THE UNIT! **
STOVE SHUTS OFF AND THE #2 LIGHT FLASHES
Possible Causes:
Possible Remedies:
1. Airflow switch hose or stove attachment pipes
for hose are blocked.
Unhook air hose from the air switch and blow through
it. If air flows freely, the hose and tubes are fine. If air
will not flow through the hose, use a wire coat hanger to
clear the blockage.
2. The air inlet, burnpot, interior combustion air
chambers, combustion blower, or exhaust
pipe are blocked with ash or foreign material.
Follow all clearing procedures in the maintenance sec-
tion of the owner’s manual.
3. The firebox is not properly sealed. Make sure the door is closed and that the gasket is in
good shape. If the ash door has a latch, make sure the
ash door is properly latched and the gasket is sealing
good. If the stove has just a small hole for the ashes
to fall through under the burnpot, make sure the slider
plate is in place to seal off the firebox floor.
4. Vent pipe is incorrectly installed. Check to make sure vent pipe installation meets criteria
in owner’s manual.
5. The airflow switch wire connections are bad. Check the connectors that attach the gray wires to the
air switch.
6. The gray wires are pulled loose at the Molex
connector on the wiring harness.
Check to see if the gray wires are loose at the
Molex connector.
7. Combustion blower failure With the stove on, check to see if the combustion blower
is running. If it is not, you will need to check for power
going to the combustion blower. It should be a full cur-
rent. If there is power, the blower is bad. If there is not,
see #8.
8. Control board not sending power to combus-
tion blower.
If there is no current going to the combustion blower,
check all wire connections. If all wires are properly con-
nected, you have a bad control board.
9. Control board not sending power to air
switch.
There should be a 5-volt current (approximately) going
to the air switch after the stove has been on for 30 sec-
onds.
10. Air switch has failed (very rare). To test air switch, you will need to disconnect the air
hose from the body of the stove. With the other end still
attached to the air switch, very gently suck on the loose
end of the hose (you may want to remove the hose en-
tirely off the stove and the air switch first and make sure
it is clear). If you hear a click, the air switch is working.
BE CAREFUL! TOO MUCH VACUUM CAN DAMAGE
THE AIR SWITCH.