Some things that may cause a furnace to not turn on include:
The air filters are dirty or clogged.
The thermostat is not set correctly.
The ignitor sensor is dirty.
Sometimes, the reason behind your furnace not starting is simple and easy to fix. Although, other times it may require a bigger repair. If your furnace is not kicking on and you have determined it is not due to one of the issues above, you should have an HVAC technician repair your furnace. Contact us today to have your furnace repaired.