Hello I have a Coleman Evcon Heating and Air Conditioning product which is a Oil Burner heating furnace. For a few days the furnace would work then it would click like it was time to shut off but it wouldn't shut off it would click for a few more times and then it would just shut off completely and when it starts to cool off in the home we have to crank up the thermostat to get it running again what is the problem, the fuel tank is brand new and we just recently had it serviced in November of 2006.

Start with the easiest. Check your thermostat to see if it is functional. When the thermostat is not calling for heat your wiring to the oil burner primary should read ( 0 ) and not 24 volts.