Not sure if theres anything wrong with my furnace just yet.
Its a mid-effiencency Lennox furnace. House built in 2000. Furnace duct and furnace checked was just cleaned in Oct 2013.
Woke up this morning, and it was 16C in the house. Thermostat is set on 18-19 all day. Furnace was on, just blowing cold air.
Went down to furnace, switched the main switch to off. And then turned it back on. Turned thermostat to 20C. Went down to check and watched the furnace fire up and flame up and function like normal. So far its working normal from the 20 mins I checked before I went to work.
From searching Beyond, found a couple old threads saying it could be the flame sensor?
Thanks in advance