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 |
| 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 |
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| Airflow |
Downflow Filter | Downflow/Horizontal |
| With Filter Kit |
The Problem Solver – Gas Furnaces
Before you call for service, check the following:
Problem | Possible cause | Possible Remedy |
No heating – | 1. Thermostat set incorrectly | 1. Adjust thermostat. See operating instructions. |
Blower does not operate | 2. Blown fuse or tripped circuit breaker | 2. Replace or reset protective device or call for servicer |
| 3. Defective component | 3. Most controls are automatic and will recycle. If your unit |
| 4. Burner does not ignite | still does not operate call for servicer. |
| 5. Main gas line turned off | 4. Call servicer |
| 6. Blower door removed or ajar | 5. Have gas company check |
| 7. Lockout | 6. Close door securely to restore power to blower |
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| and gas valve |
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| 7. Turn power |
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Insufficient heating or cooling | 1. Dirty filters | 1. Clean or replace |
| 2. Air not circulating freely | 2. Check supply registers and return grills for blockage |
| 3. Blocked outdoor coil | 3. Clear away leaves or other debris |
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No Heat – Vent motor is running | 1. Restricted or plugged furnace | 1. Remove drain clamps to condensate trap |
| condensate drain | and drain pan outlet |
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| 2. Flush or clean drain blockage |
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| 3. Reinstall clamps |
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Unusual Noise |
| Call your local servicer |
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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.
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
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.
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