Lennox Furnace Control Board Fuse

I removed all the wires going to my thermostat and it would not blow the fuse when powered on.

Lennox furnace control board fuse.

Electric furnace thermostat control wire. I changed thermostat without turning off power and think i blew fuse. Earlier it was trying to fire but the ignition rod did not work and the diagnostic led s were alternating. Part number part description part link 11h36 lennox 11h36 control board kit view lennox part 11h36 11k83 lennox 11k83 speed controller tsc5 view lennox part 11k83 11k84 lennox 11k84 speed control tsc6 view lennox part 11k84 12j99 lennox 12j99 integrated furnace control board view lennox part 12j99 12w64 lennox 12w64 integrated.

Im going to show you how to fix this problem with just a screwdriver and maybe 5 3 amp fuses and we will fix the 3 amp short im just making this video for my. Do you know the model of your lennox thermostat. It was a honeywell thermostat. Not any part on blower furnace.

Cartridge fuse flat blade dual element time delay class rk5 250vac 125vdc 200a 7 1 8 l 1 9 16 dia. If you have a gas furnace one of the valves may be failing. Once you find the control panel lift the panel up and away from the appliance you can set this aside for now. The thermostat where you control temp.

How old is it. This video provides step by step instructions for replacing the control board on lennox furnaces. I was blowing the 5 amp fuse on the control board for my forced air gas furnace. The most common reason for replacing t.

Where is fuse location on lennox merit series control board. Examine your furnace and look for a raised button or switch to the right of the ignition control box or the limit control switch. House was built in 2004. Your furnace s control board has a separate fuse that protects it from getting too hot.

I turned off the input power and attached terminal r 24 vac power to thermostat and the fuse blew. Fyi this is really only a temporary fix and you should figure out why your fuse blew in the first place. When a valve is unable to open and close properly it can sometimes heat up causing an electrical short that blows a fuse. Press and release the limit control switch to rest your lennox furnace.