Frequently asked questions from our certified technicians

Frequently asked questions.

Will a clogged filter prevent the Lennox furnace from operating?

The Furnace Could Stop Working Due to Clogs
A clogged air filter could harm the furnace’s internal parts in the worst scenarios. The inability to start the furnace signifies that the fan, pilot light, heat exchanger, pressure switches, gas valves, or other parts have been harmed.