How to Repair Electric Furnaces


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  • Although an electric heating system does have advantages, its operating cost generally makes it less desirable than any of the other furnace systems available today. The high cost means that minimizing heat loss caused by improperly installed ducts or inadequate insulation is even more important than with other types of systems.

    Electric furnaces use heating elements controlled by relays to warm the air.

    Electric furnaces use heating elements controlled by relays to
    warm the air. The elements are fused on a separate panel.

    For maximum energy efficiency, have a professional service person clean and adjust your electric furnace every year before the beginning of the heating season. Do not attempt any repairs to the heating elements, electrical connections, relays, transformers, or similar components of an electric furnace; repairs to these components must be made by a professional service person.

    The controls of an electric furnace may be mounted on the surface of the housing or installed behind an access panel on the front of the furnace. The access panel may be slip-fit on hooks fastened to the furnace housing with a series of sheet-metal screws. To remove the access panel to the blower, filter, and blower motor, slip the panel up off hooks or remove a series of sheet-metal screws.

    Before you begin working on your furnace, try to determine exactly what the problem is. Look for your problem, and possible solution, on the handy chart on the next page.

    For more articles on home repair, check out the following links.
      • Furnace Maintenance: Save yourself time and money by learning the steps to keep youor furnace in prime condition.
      • Major Appliance Repair: If the furnace isn't the only thing in your house on the fritz, you can learn how to fix other machines in this article.
      • Small Appliance Repair: Once you've tackled the furnace, a toaster or blender seems like child's play. Find out how to fix them here.
      • Thermostat Maintenance: To make sure there's actually a problem with your heating system, you may want to check the thermostat, too. Learn how to calibrate a thermostat.
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