I had a brief scare just now. It is 7-degrees right now and getting colder so I definitely don't want a furnace failure.
I came home and house was at 62 with thermostat at 64 (my standard not-at-home setting) and I manually upped it to 72. Normally when I do this the furnace comes on in about 4-5 seconds. This time, however, nothing happened. The thermostat said "heat on", so I go down and every thing looks ok. Plenty of oil, water pressure is correct, furnace temperature is normal. I tried pressing the reset button but nothing happened.
So I go upstairs and get ready to call the emergency service when I hear the furnace come on, a good 3 or 4 minutes after I had originally turned the thermostat up.
What could have caused the delay?