quote:Originally posted by msdalem1
This happened a couple of years ago for the first time, and bigger cold air return ducting was installed. It has run fine since, until last month. The high limit switch would shut down, but I could get it running again by shutting the thermostat down to 50 then turning it back on. A repairman installed a new igniter, and changed piping outside to eliminate drafts. This worked until last night. Now it won't work at all. Even shutting the power switch off has no effect.Also forgot to mention.. I pulled out a filter that I hadn't changed in a while and it fell apart inside while the furnace was running. I told repairmen this.