Furnace Safety Shut Off

Imagine, on the other hand, that something goes wrong with your blower system. If your furnace is unable to move all of the heat that it is generating out into your home, the combustion chamber will continue to become hotter and hotter. Once this heat reaches a certain threshold, it will activate the high limit switch, which in turn will shut down the flow of gas into the furnace.

In this way, the high limit switch acts to prevent a potentially dangerous scenario. You see, if the temperature in the furnace was allowed to keep growing higher and higher, eventually it would cause a devastating explosion to occur. If you have noticed that your furnace seems to be turning on periodically, yet no heat is coming out through the registers of your home, it’s high time to have a professional come check for problems in your blower system. Until you do, the only thing standing between your furnace and disaster will be the high limit switch.

If you have any questions, don't hesitate to reach out to an expert in heating or AC in Edmonton AB.