Does the thermostat make an audible click when you turn it up 2 or more degrees? Most electronic thermostats do when they cut in. You may have a bad thermostat or no power to your furnace. Post the make and model and serial # of the furnace.
Heater and A/C won't turn on
Forgive me for any bad terminology. 
My heat wouldn't turn on today. I have a programmable thermostat which has worked fine for a few months. I tried manually turning the temp up an additional five degrees from where it was and nothing happened - no heat and the fan didn't kick on either. I even tried turning on the central A/C and lowered the temperature to 7 degrees below the current temp and nothing happened. It doesn't look like any of my breakers tripped. I checked to make sure I do have gas (stove worked, hot water works) and my electric is working. Earlier in the week, the electric stacks on the side of my condo were replaced, but the heat has worked since then. The emergency switch for the gas burner is in the on position.
I'm really not sure what the issue is. Let me know if there is anymore info that is needed to help describe this problem.
My heat wouldn't turn on today. I have a programmable thermostat which has worked fine for a few months. I tried manually turning the temp up an additional five degrees from where it was and nothing happened - no heat and the fan didn't kick on either. I even tried turning on the central A/C and lowered the temperature to 7 degrees below the current temp and nothing happened. It doesn't look like any of my breakers tripped. I checked to make sure I do have gas (stove worked, hot water works) and my electric is working. Earlier in the week, the electric stacks on the side of my condo were replaced, but the heat has worked since then. The emergency switch for the gas burner is in the on position.
I'm really not sure what the issue is. Let me know if there is anymore info that is needed to help describe this problem.
