What is the typical high limit setting for a forced air gas furnace?

The typical high limit setting for a forced air gas furnace is around 200°F. This limit serves as a safety mechanism to prevent overheating of the furnace and associated components. If the temperature reaches this point, the limit switch will activate and shut off the furnace to avoid potential damage or even fire hazards.

The setting is intentionally designed to allow for efficient heating while safeguarding the system. Operating at too high a temperature can lead to increased wear on the furnace and a higher risk of failures or unsafe conditions. Thus, maintaining the limit at or around this temperature ensures that the furnace operates effectively within safe parameters.