Furnace high limit switch

furnace high limit switch

Troubleshooting the limit switch on the 80% AFUE gas furnace can be lethal, the fuels are highly flammable.
A high - limit switch is a protective part of a furnace designed to keep the mechanism from overheating itself. A furnace is at a risk of overheating any time airflow.
Then the temp would get low, the furnace would kick in to heat the home and on If the high limit switch was bad, the furnace should not fire.

Furnace high limit switch - backgammon

Is there some type of heat exchanger you're referring to? But just want to know why the heater works but not the air conditioner with the limit switch bypassed. After this step, though, it should be verified that the furnace has proper air flow. The solid-state switches sometimes have a reset button that should be checked for before replacing. Physics, Thermodynamics, Fluid Flow and Combustion. About Furnace Limit Switches Shop the extensive inventory of home improvement and heating, cooling and air products! Let's say the flames are burning but the furnace fan breaks worldofdiscovery.info would be nothing to push the heat out of the unit and thus creating extremely high and potentially dangerous temperatures in the furnace.
Gas Furnace Hi Limit Switch Testing