Tappan Short Cycling on High Limit

Furnace starts and runs for a few minutes, then shuts off and restarts frequently (short cycling).

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Oversized furnace relative to ductwork, dirty filter, closed registers, blower speed set too low on Tappan control board

Safety: Turn off power before changing blower speed taps.

Steps:

Replace or clean the air filter.
Open all supply and return registers fully.
Check the blower speed tap used for heating on the control board (refer to the wiring diagram). If set to a low speed, consult the installation manual and move to a higher speed tap to increase airflow.
If short cycling persists, have a technician measure temperature rise and static pressure to determine if the furnace is oversized or ducts are undersized.

Medium 3/5

Blower Motor Speed Tap

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