Which action is suggested if your furnace continually exceeds the operational temperature?

When a furnace continually exceeds its operational temperature, the most appropriate action is to shut down the system and check the limit switch. The limit switch plays a critical role in regulating the temperature within the furnace. It is designed to shut off the furnace if it overheats, preventing potential damage or hazardous situations.

If the furnace is running too hot, it could indicate a malfunction in the limit switch or an issue with airflow, such as a clogged air filter. By shutting down the system, you can safely assess the situation, inspect the limit switch for any faults, and ensure that the furnace operates within its safe temperature range.

Inspecting air filters regularly is important for maintaining efficient airflow, but this action alone may not directly address the immediate issue of overheating if the limit switch itself is compromised. Contacting the manufacturer for warranty information may be necessary if recurring problems arise, but it does not provide an immediate solution to the current overheating issue. Turning on the system for a quick check without addressing the overheating risk could pose safety hazards and should not be the first course of action.