Gas Furnace High-Limit Control: A Crucial Safety Feature

What is the function of the high-limit control on a gas furnace?

- Prevents overheating

- Shuts down the furnace

Answer:

The high-limit control on a gas furnace is a safety feature that shuts off the furnace when temperatures become dangerously high, either inside the furnace itself or in the flue.

The high-limit control in a gas furnace is a safety device that prevents overheating by shutting down the furnace when temperatures inside it or in the flue become excessively high. This is crucial to prevent the risk of fires or damage to furnace components. As such, the high-limit control acts as a vital safeguard in the operation of a gas furnace.