There are a number of things which can cause your furnace to break down - that’s why it helps to have a trusted HVAC professional help you out when you are experiencing issues. The most common causes of furnace breakdowns in Ottawa are: Broken thermostat Dirty or clogged filters Pilot light/electrical ignition failure Blower motor failure Fuel supply issues No matter the cause of your furnace breakdown, Advanced HVAC’s team of licensed and insured professionals can help you get your home’s heating back running again!