22 04/217058-805F
Symptom Possible Cause Corrective Action
Slow or smoky start-up
(Cont’d)
Dirty exhaust and/or venting system.
Check for ash build up in appliance,
including behind rear panels, rebox, heat
exchanger, exhaust blower and venting.
Feed system fails
to start.
Out of fuel.
#2 snap disc may be defective.
Vacuum switch not closing. No vacuum.
Feed system jammed or blocked.
Feed spring not turning with feed motor.
Feed motor defective or not plugged in.
Check hopper, ll with fuel.
Replace snap disc. Firebox door must be
closed securely.
Check exhaust blower is plugged in
and operating.
Check vacuum switch is plugged in.
Check vacuum hose is in good condition,
clear and connected at both ends.
Check thermocouple is in good condition
and plugged in properly.
Make sure venting system is clean.
NOTE: High winds blowing into the venting
system can pressurize the rebox
causing loss of vacuum.
Empty hopper of fuel. Use a wet/dry
vacuum cleaner to remove remaining fuel,
from hopper, including feed tube.
Check feed chute for obstructions.
Loosen 2 screws and jiggle feed assembly.
Check that set screw is tight on feed
spring shaft at end of feed motor.
Check connections on feed motor, replace
if defective.
No call light. Appliance
does not begin
start sequence.
Thermostat not set to a high enough
temperature.
Snap Disc #3 tripped.
No power.
Fuse blown.
Connections at thermostat and/or appliance not
making proper contact.
Defective thermostat or thermostat wiring.
Control box defective.
Adjust thermostat above room
temperature.
Reset snap disc.
Connect to power.
Replace fuse.
Check connections at thermostat and
appliance.
Replace thermostat or wiring.
NOTE: To test thermostat and wiring, use
a jumper wire at the thermostat
block on the appliance to by-pass
thermostat and wiring.
Replace control box.
Appliance fails to
shut off.
Call light on.
Turn thermostat off.
If call light does not go out, disconnect
thermostat wires from appliance. If call
light does go out, thermostat or wires are
defective.
Table 22.1
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