The furnace burners shut off and the blower continues to run; the diagnostic label or display indicates an open limit.

Safety: Turn off the power before accessing internal components. Surfaces may be hot.

Steps to check:

• Replace the filter: Install a clean filter of the correct size and MERV rating recommended by Maytag. Avoid overly restrictive filters unless the duct system is designed for them.
• Check ductwork: Inspect visible return and supply ducts for crushed sections or closed dampers. Open any closed dampers.
• Reset the limit (if manual): Some auxiliary limits have a manual reset button. If tripped, press to reset once after correcting airflow issues. Do not repeatedly reset without fixing the cause.

When to call a technician: Persistent limit trips may indicate undersized ductwork, incorrect blower speed, or a failing limit switch, all of which require professional evaluation.