What is the maximum allowable setting for the high limit on a converted forced air furnace?

The maximum allowable setting for the high limit on a converted forced air furnace is 250° F. This is a crucial safety specification aimed at preventing overheating and ensuring that the furnace operates within safe temperature limits.

This temperature is set to ensure that the furnace can reliably provide heat without risking damage or creating hazardous conditions, such as excessive heat build-up, which can lead to system failure or potential fire hazards. Adhering to this limit is essential for the functionality and safety of heating systems, especially in older conversions where equipment may not have as many built-in safety features as newer models.

Understanding this limit reinforces the importance of following manufacturer guidelines and safety regulations during installation and maintenance, contributing to the safe operation of gas-fueled appliances.