Heat Exchanger And Burner Maintenance; Lubrication; Vent System; Troubleshooting - Nordyne 045C-23ASA Installation Instructions Manual

forward and reverse, working the cable in and out
several times to obtain suffi cient cleaning. Repeat
this sequence for each heat exchanger tube.
17. Remove all loosened debris from the heat exchanger
tubes using a vacuum cleaner.
18. Using a bright light, check the condition of the upper
and lower sections of the heat exchanger tubes.
19. Inspect the burners for accumulated dust or debris.
If burners must be cleaned, see Cleaning of Burners
(page 22).
20. Replace all the parts in reverse order that they were
removed.
21. Check gaskets for damage. Replace if needed.
22. Follow the lighting instructions found on the furnace
door to return the furnace to operation. Verify proper
operation after servicing.

Heat Exchanger and Burner Maintenance

The furnace should operate for many years without soot
buildup in the fl ue passageways, however, the fl ue, vent
system, and burners should be inspected and cleaned
(if required) by a qualifi ed service technician annually
to ensure continued safe operation. Pay attention to any
deterioration from corrosion or other sources.

Lubrication

The bearings in the blower motor and inducer blower used
in these furnaces are pre-lubricated and sealed by the
manufacturer. No further oiling of the bearings is required
for the life of the motor.

Vent System

Holes in the vent pipe or heat exchanger can
cause combustion products to enter the home.
Replace the vent pipe or heat exchanger if leaks
are found. Failure to prevent the circulation
of combustion products into the living space
can create potentially hazardous conditions
including carbon monoxide poisoning that
could result in personal injury or death.
Check the vent pipe and/or chimney to ensure that it is not
corroded or blocked by debris. Any corroded section of vent
pipe must be replaced, and any obstruction or blockage
must be removed prior to operating the furnace.
22
WARNING:

TROUBLESHOOTING

If the furnace fails to operate check the following:
• Is the thermostat operating properly?
• Are the blower compartment door(s) in place?
• Is the furnace disconnect closed?
• Has the circuit breaker tripped or the control board
fuse burned open?
• Is the gas turned on?
• Are any manual reset switches open?
• Is the fi lter dirty or plugged?
• Is the fl ame sensor coated? (Remove and clean with
steel wool).
• Are all the LED's on the furnace control board constantly
ON? If not, refer to Table 5 (page 29) or the wiring diagram
(Figure 17, page 30) to determine fault condition.
IMPORTANT NOTE: The furnace will lock out after 5
failed attempts for ignition and will try again every
hour if the call for heat remains.
• If the Inducer Blower is operating, and items above
have been verifi ed, check the Blower Limit Switch and
reset if necessary. See Figure 18 or 19 (page 35) for
component location.
• If the furnace operates when the Blower Limit Switch is
reset, contact a qualifi ed service technician to identify
and repair the problem.
• If the furnace still doesn't operate, check the Flame
Roll-out Switches and reset if necessary. See Figure
18 or 19 for component location.
• If the furnace operates when the Flame Rollout Switch
is reset, contact a qualifi ed service technician to identify
and repair the problem.