Several blocked air filters Blocked blower motor cooling plate Blocked evaporator coil Blocked off register Furnace high limit switch Crack in a heat exchanger Blocked secondary heat exchanger Inducer motor Rodent blocking the furnace air intake Previous Next What is short cycling Short cycling is a term used to describe a furnace or heating appliance
Furnace attempting to light Flue pipe being removed from furnace Bird inside inducer housing Inducer wheel showing bird at bottom Bird lodged in inducer housing Bird being removed from inducer housing Previous Next Every winter I get a call from a client that has an 80% efficiency furnace with no heat. The result……ignition failure. In
Typical furnace transformer Furnace power switch Typical furnace door switch zip-tied closed Test lead inserted into 120-volt power connector Meter showing 120-volts Showing test lead on 24-volt output on transformer Meter reading 24-volts Previous Next So you think you may have a bad transformer on your furnace but you aren’t sure how to be certain.
Furnace high limit switch Testing a high limit switch removed from furnace by holding a lighter under the disk Previous Next A high-limit switch is one of the most important safety devices in your furnace. It basically keeps your furnace from catching fire and burning down your home! A high-limit switch works by shutting down
