Troubleshooting guide

Page 81
1. Vacuum
Loss of vacuum may be causes by:
a. Operator error or neglect
 Leaving the Main Door open too long
 Forgetting to close the Main Door
 Leaving the Ash pan Door open too long
 Forgetting to close the Ash pan Door
 Allowing the Chimney to get plugged.
If an owner calls in with a #2 diagnostic light flashing, first cover all items listed above
that may be caused by incorrect operation of the stove. Quiz the owner about their habits
in regards to the Periodic maintenance. If they have been lax in cleaning the Ash Traps
and venting system, have them first clean their stove and try it again.
b. Component Failure. Which components may be the cause?
 Combustion Fan
 Vacuum switch
 Control Board
 Vacuum hose
 Wiring harness
 Wiring connections
Let’s check the simplest item first:
• Check to see if the combustion Fan comes on.
 If the combustion Fan isn’t running, check the wiring connections at the
fan.
 Check the wiring connections on the opposite end at the Terminal Block
(white wire) and at the Molex connector (Blue wire) that plugs into the
control board. They may look OK, but in fact may not be making contact
the pins from the control board. Push the Blue wire into the Molex
connector to ensure they are seated properly.
 Check both wires in the harness for continuity if needed with an OHM
meter. (White and Blue wire)
 Check for voltage at the fan; if voltage is present and the fan isn’t running
replace the combustion fan.
• Check the control board.
 Check for voltage at the pin out for the Blue wire at the control board. If
no voltage is present replace the control board.