I have a thermo pride oil furnace that is 13 years old but has only been used for 3 or 4 heating seasons due to wood stove my main heat source. The unit will not run now. When unit is started the reset trips when the burner doesn't fire and get up to temp. It would appear that the pump is not drawing fuel. I can crack the air bleed screw and pull a good flow of fuel but when I close the bleeder and the furnace/pump shuts off the fuel drains back to the tank. Pump bad?

Hi All, I have an intermittent ignition gas furnace. The pilot flame intermittently will not light. It produces good spark which I can hear and see. The problem seems to be gas supply to the pilot burner. I tried testing for power to the pilot valve circuit on the gas valve assembly using a multimeter. I thought I had power to the valve. However, I may have done the test wrong, or interpreted the results incorrectly, because, I replaced the gas valve assembly, and I still have the same issue. Occasionally when the furnace gets a call for heat, it will produce spark, but the pilot burner does not light. The furnace has a Honeywell S86F ignition control module. Could someone please tell me how to perform a valid test of this module to determine if it is attempting to energize the pilot valve? Any help is much appreciated. Thanks.