8 32-5064-WEB01
Proper Maintenance – Gas Furnaces
Air filters may also be located
outside of the furnace using a
remote filter grille. The filter grille
could be in a hallway, wall, or in the
ceiling. Check with your dealer for
the exact location of your filter and
the method of changing the filters.
Downflow/Horizontal furnaces are
factory supplied with 2 standard
size permanent type air filters
which may be located remote
to the furnace or in the return air
duct. Check with your dealer for the
location of your filters.
A downflow/horizontal furnace return air filter application, as
shown, features two 14" x 20" x 1" filters in the 17-1/2" wide
furnace cabinets; or two 16" x 20" x 1" filters in the 21" and
24-1/2" wide furnace cabinets.
For regular dealer maintenance please refer to
www.acca.org/industry/quality
Airflow
Downflow/Horizontal
With Filter Kit
Before you call for service, check the following:
Problem
Possible cause
Possible Remedy
No heating –
Blower does not operate
1. Thermostat set incorrectly
2. Blown fuse or tripped circuit breaker
3. Defective component
4. Burner does not ignite
5. Main gas line turned off
6. Blower door removed or ajar
7. Lockout
1. Adjust thermostat. See operating instructions.
2. Replace or reset protective device or call for servicer
3. Most controls are automatic and will recycle. If your unit
still does not operate call for servicer.
4. Call servicer
5. Have gas company check
6. Close door securely to restore power to blower
and gas valve
7. Turn power on‑off‑on‑off twice in 30 seconds
Insufficient heating or cooling
1. Dirty filters
2. Air not circulating freely
3. Blocked outdoor coil
1. Clean or replace
2. Check supply registers and return grills for blockage
3. Clear away leaves or other debris
No Heat – Vent motor is running
1. Restricted or plugged furnace
condensate drain
1. Remove drain clamps to condensate trap
and drain pan outlet
2. Flush or clean drain blockage
3. Reinstall clamps
Unusual Noise
Call your local servicer
The Problem Solver – Gas Furnaces
NOTE: Improperly sized vents can cause the formation of
condensate, combustion gas leakage and spillage, and an
inoperable furnace.
A furnace is not a household appliance. It is complex and
requires professional maintenance and repair. Attempts at
“do-it-yourself” repairs on an in-warranty unit may void the
remainder of your warranty.
Other than performing the simple maintenance recommended
in this manual, you should not attempt to make any adjustments
to your furnace. Your dealer will be able to take care of any
questions or problems you may have. A periodic inspection of
your furnace should be made by a qualified service agency at
the start of each heating season.
In the event that electrical, fuel, or mechanical failures occur,
immediately turn the gas supply off at the manual gas valve located
on the gas pipe leading to the furnace before turning off electrical
power to the furnace. Contact a qualified service agency.
Keep your furnace looking like new for years.
Clean the enamel finish of your furnace with ordinary soap and
water. For stubborn grease spots, use a household detergent.
Lacquer thinner or other synthetic solvents may damage the finish.
CARBON MONOXIDE POISONING HAZARD
DO not attempt to change the venting system. Failure to
follow the installation and operation instructions for the
venting system’s operation could result in carbon monoxide
poisoning or death.
Downflow Filter
Airflow
