7
440 02 7000 02
Specifications subject to change without notice.
2. Close the external manual gas valve (Figure 17).
Figure 17
Close the external manual gas valve
3. Turn off electrical supply to the furnace (Figure 18).
Figure 18
Turn Off Electrical Supply
4. Remove main furnace door.
5. Turn control switch on the gas control to OFF position
(Figure 19).
Figure 19
Gas control switch to OFF
O
F
F
ON
GAS CONTROL SWITCH
SHOWN IN “OFF” POSITION
6. Replace main furnace door.
7. If the furnace is being shut down because of a malfunction, call
your dealer as soon as possible.
PERFORMING ROUTINE MAINTENANCE
With proper maintenance and care, your furnace will operate
economically and dependably. Instructions for basic maintenance
are found on this and the following pages. However, before
beginning maintenance, follow these safety precautions:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off electrical power supply to your furnace before
removing the access doors to service or perform
maintenance.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in personal injury.
Although special care has been taken to minimize sharp
edges, be extremely careful when handling parts or reaching
into the furnace. Wear safety glasses, gloves, and
appropriate protective clothing.
CAUTION
!
FILTERING OUT TROUBLE
UNIT PERFORMANCE HAZARD
Failure to follow this caution may result in product damage.
Never operate your furnace without a filter in place. Doing
so may damage the furnace blower motor. An
accumulation of dust and lint on internal parts of your
furnace can cause a loss of efficiency.
CAUTION
!
A dirty filter will cause excessive stress on the furnace, heat
exchanger, and blower motor and can cause it to overheat and
automatically shut down. The furnace filter should be checked
every 4 weeks and cleaned or replaced if necessary.
If installed with factory specified disposable media filter, check or
replace filter before each heating and cooling season. Replace
disposable media filter at least twice a year.
If your furnace filter needs replacing, be sure to use the same size
and type of filter that was originally specified.
The air filter for the furnace may be located in the blower
compartment or in a filter cabinet/rack attached to the side or
bottom of the furnace. If air filter has been installed in another
location, contact your dealer for instructions. To inspect, clean
and/or replace the air filter(s), follow these steps:
1. Turn off electrical supply to the furnace (Figure 20).
Figure 20
Turn OFF electrical supply
2. Remove main furnace door (Figure 21).
Figure 21
Main furnace door
