If something is wrong with your furnace, you’ll want to make sure that you have a licensed and certified professional look at it. Only a professional furnace repair service will be able to properly identify the problem and to fix it. The following are a few common signs that you’re in need of a professional furnace repair service:

• Your furnace isn’t responding to your thermostat – If you crank the thermostat up but your furnace isn’t responding, it could be the result of a faulty thermostat. It’s an easy fix, but one you’ll need a professional for.
• Your furnace turns on but isn’t producing heat – If your furnace turns on but your home isn’t getting warm, it could be because the blower or circulating fan isn’t working properly. There could also be a number of other issues contributing to the problem.
• Your blower won’t turn off– If your blower is constantly running, it means there’s probably a faulty switch. It could also mean the blower is about to fail completely.
• Your furnace is producing loud noises– Strange, loud noises are usually an indication that one of the components of your furnace is either broken or about to break.
• Your furnace won’t turn on at all– There’s obviously a serious problem if you can’t get your furnace to turn on at all. The source of the problem could be any number of issues, which is why it will need to be thoroughly inspected.