Hi,

I have oil forced air heating system and installed a new burner/boiler 2 years ago. I just went to test my upstairs zone by notching up the thermostat and it does not come on. Any suggestions? Also we have had some cool nights and it did not kick on on its own. Thank you.--Gail

Check the static system pressure. Most should be at 12 psi depending on the height of the home.