I've run into a small glitch with my dual fuel. I have a dual-energy HVAC system with a Carrier HP with an oil furnace. Standard run-of-the-mill Carrier thermostat that came with the HP and a dual-energy relay board.
My problem is that my oil delivery company failed to deliver oil and my tank is on empty. I've put in a call to refill the tank, but it will take 24-48hours. Currently, the furnace runs (there is probably just enough left in the bottom of the tank), but I am afraid that it may dry out the tank and then I would be forced to purge the line, which requires an additional service call (extra costs). (Not sure how to purge it myself, nor do I want to mess with the dirty oil...).
Current weather around here is roughly -7C to 2C. I figure that just the HP will be enough to heat the house.
The question is if there is a way I can disable the oil burner until I get the tank filled without disabling the HP? I tried disconnecting the white wire from the relay-board to the furnace relay, and it does disable the burner from firing, but since the thermostat (and HP) don't know that the oil burner has been disconnected, they still try to fire up the burner every so often to defrost and/or to produce more heat to raise temp more quickly.
Am I stuck? Is there anything I can do temporarily for the next couple of days to rescue the situation?