12
Air Filter(s)
- B6BW air handlers are supplied with a single
air filter when shipped from the factory. It is recommended
that the filter be cleaned or replaced monthly.
WARNING:
Never operate the furnace without a filter in
place. Dust and lint in the return air can build
up on internal components, resulting in loss of
efficiency, equipment damage, and possible fire.
Newly built or recently renovated homes may require
more frequent changing until the construction dust has
minimized. Filter sizes shown in
most local retailers.
Filters designed to remove smaller particles such as
pollen, may require additional maintenance.
Blower Compartment
- Dirt and lint can create excessive
loads on the motor resulting in higher than normal operating
temperatures and shortened service life. It is recommended
that the blower compartment be cleaned of dirt or lint
that may have accumulated in the compartment or on
the blower and motor as part of the annual inspection.
Blower Fan Wheel
- Inspect the blower wheel blades
for accumulations of dirt and clean if necessary. Inspect
mounting nut for tightness when done.
Blower Motor & Assembly
- Inspect the blower assembly
and motor mounting brackets for tightness and corrosion.
Correct deficiencies if necessary. The blower motor
contains sealed bearings and under normal operating
conditions, no maintenance is necessary for the life of
the equipment.
RED LED (AN2)
DIAGNOSTIC DESCRIPTION
OFF
Control Fault (No Power)
Flash
Blower Fault
ON
Normal Operation
Table 5. Furnace Control Board Fault Conditions
TROUBLESHOOTING
If the air handler fails to operate, check the following:
• Is the electric turned on?
• 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?
• Are any manual reset switches open?
• Is the filter dirty or plugged?
• Is the LED on the furnace control board constantly
ON? If not, refer to
to determine fault condition.
Table 4. Filter Sizes
MODEL NUMBER
FILTER SIZE
B6BW-018K
16” x 20 x 1”
B6BW-019K
20” x 20 x 1”
B6BW-024K
16” x 20 x 1”
B6BW-030K
20” x 20 x 1”
B6BW-036K
24” x 20 x 1”
