Electric Furnaces:Furnaces without Air Conditioners and Troubleshooting an Electric Furnace.

Furnaces without Air Conditioners

When an electric furnace is installed without an air conditioning unit, the furnace should be shut down at the end of the heating sea- son. The procedure for doing this will be found in the furnace owner’s manual. It is a simple operation that generally consists of opening the main fused-disconnect switch (or switches) in the power-supply lines serving the furnace.

Troubleshooting an Electric Furnace

Any appliance may sometimes fail to operate efficiently because of a malfunction somewhere in the equipment. The problems most commonly associated with electric-fired furnaces are listed in Table 14-4.

Caution

DEADLY HIGH-VOLTAGE CONDITIONS exist within the cabinet (case) of an electric furnace. Do not attempt any troubleshooting if it might involve contact with electric controls and components unless you are a trained HVAC technician or have equivalent experience with electric furnaces.

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