Luxaire Overheating and Limit Cycling

Furnace starts then shuts off after a few minutes; blower continues to run with cool air.

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

Dirty filter, Blocked return air, Undersized or restricted ductwork, Blower motor not at correct speed

Safety: Overheating can damage the heat exchanger. Address airflow issues promptly.

Steps to check:

Replace filter: Install a new filter of the correct size and MERV rating recommended by Luxaire.
Open returns and supplies: Make sure furniture or rugs are not blocking grilles.
Check for closed dampers: Open any manual dampers in the duct system that may be restricting flow.

If the problem persists, a technician should measure temperature rise and adjust blower speed or evaluate duct design.

Medium 3/5

Blower Motor or High Limit Switch

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