We have a Lennox Conservator G8E Furnace - serial Number 6379e18615 - I have no idea how old it is. Our Gas supplier checked it out and advised that the Fan Limit Control is not working. The heat co,es on and the fan starts then immediately cuts off. Is this a major problem as we are negotiating for a replacement furnace, but at minus 20 - 30 is is uncomfortable. Thanks - Part number and price if possible

We have a Lennox Conservator G8E Furnace - serial Number 6379e18615 - I have no idea how old it is. Our Gas supplier checked it out and advised that the Fan Limit Control is not working. The heat co,es on and the fan starts then immediately cuts off. Is this a major problem as we are negotiating for a replacement furnace, but at minus 20 - 30 is is uncomfortable. Thanks - Part number and price if possible
We would appreciate a prompt reply