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Electric Furnace Maintenance



Before proceeding, be sure the area is well ventilated. Turn the thermostat OFF. If the blower is running, wait until it stops automatically. Turn OFF and electrical power supplies to the furnace. Check all metal parts and surfaces to be sure they have cooled to room temperature before you begin.


Filters used with this electric furnace must be installed external to the furnace casing. DO NOT attempt to install filters inside the furnace cabinet. Some installations may have the air filter in a rack attached to the casing of the furnace or placed in the return air duct. If the filter location or replacement process is not obvious, contact your installer or service technician for assistance.

Every time the external air filters are changed the following items should be visually inspected:

  • Check all components to be sure they are in good condition and that there are no obvious signs of deterioration;
  • Check for dirt or lint on any surfaces or on components. Do not try to clean any of the surfaces or components. Cleaning of the furnace and its components must be done by a qualified service professional.

If during the inspection of your furnace, you find any of the following conditions:

  • Excessive amounts of dust and lint on components;
  • Damaged or deteriorated components or surfaces;
  • Water on any surface inside or outside of the furnace;

Do not operate the furnace, call a certified dealer or servicing contractor to check or clean your furnace, or for more information if you have questions about the operation of your furnace. If all components appear to be in good operating condition, replace the furnace access panels/doors. Turn ON the gas and electrical power supplies to the furnace, and set thermostat to the desired temperature.

How to clean your filter

High-velocity filters may be cleaned with a vacuum cleaner or washed with a garden hose. Be sure to shake off excess water and allow filter to completely dry before re-installing the filter.

Replace throw away filter(s) with the same size new filter(s). Throw away filter(s) may be replaced with cleanable filter(s) at this time.


Even with good filters properly in place, blower wheels and motors will become dust laden after months of operation. The entire blower assembly should be inspected annually. This service must be performed by a qualified service agency.

NOTE: The spring-loaded safety cut-off switch, mounted at the blower deck will automatically cut off the electrical power supply to the furnace when the furnace blower access panel/door is removed. As a safety precaution, all electrical power and to the furnace should be turned off before servicing.


The motors in these furnaces are permanently lubricated, and do not require periodic oiling.


If your furnace is not operating correctly, the following visual checks should be made before contacting your local contractor, dealer, or service provider.

  • Make sure electrical power is turned on.
  • Check that the furnace blower access panel/door is correctly positioned. The electrical power supply will be cut off if this door is removed.


The furnace should be cleaned and adjusted by a certified dealer or qualified service contractor once a year or before the start of every heating season. The following items must be cleaned and serviced or replaced if there are signs of deterioration.