My heat isn't turning off even when thermostat is off I changed to new thermostat but still working non stop how can I fix it?

If your heat isn't turning off even with a new thermostat, check if the thermostat is wired correctly and that it's compatible with your heating system. Additionally, inspect the system's wiring for any short circuits or malfunctions. You might also want to check the settings on the thermostat to ensure it's set to "off" and not on a continuous or override mode. If the problem persists, it may be best to consult a professional HVAC technician for further diagnosis.