I'm trying to troubleshoot the following problem with my Lennox Pulse
21 furnace: the furnace fan will sometimes shut off in the middle of a cycle (while the gas is still on and the furnace is pulsing). Occasionally this will continue until the limit is hit. The furnace has a honeywell fan/limit control but only the limit side is used... I'm assuming that the blower motor is controlled elsewhere.I've already tried replacing the fan relay but that did not solve the problem. Can anyone provide some insight as to how the blower motor is controlled in the pulse 21? It seems funny that it has a fan/limit control but nothing is connected to the fan side...