Furnace Maintenance near you

Each furnace model has its own service procedure, set out in the manufacturer's installation and maintenance manual, and a careful technician follows it rather than a generic checklist. The exact steps depend on the fuel and the age of the unit, but a complete visit generally works through the same systems, from the flame to the vent. Ask for a written report of what was checked, what was cleaned or adjusted, and anything to watch or repair.

Your part is about airflow, housekeeping and paying attention, never about the gas valve, the burner or the venting. Natural Resources Canada suggests changing or cleaning furnace filters every three months, or sooner as they become loaded. Anything beyond the tasks below, such as taking the burner apart, adjusting gas pressure or disconnecting a vent pipe, belongs to a licensed technician.

Start with the manufacturer's manual, since it sets the service interval the warranty assumes. Natural Resources Canada recommends servicing natural gas and propane furnaces at least every two years, and cleaning and tuning oil-fired furnaces every year. Health Canada advises having fuel-burning appliances inspected by a professional at least once a year or according to the manufacturer's instructions. When these differ, the stricter schedule is the safer choice, which is why many households book a visit every fall.

Timing matters as much as frequency. Late summer and early fall are usually the easiest times to get an appointment, and a furnace that sat idle all summer gets its first run under a technician's eye rather than on the first frosty night. An electric furnace has no burner or vent to service, but its blower, heating elements, filter and controls still benefit from the periodic checks its manual describes.

A furnace rarely quits without warning. Small changes in sound, cycling or comfort often point to a dirty part or a control that has drifted, something a maintenance visit can correct before it becomes a no-heat call in the middle of January.

Many HVAC companies sell maintenance plans that bundle a yearly tune-up with a reminder when it is due, and sometimes priority booking or reduced rates on repairs. A plan is convenient if you tend to forget the visit, but weigh it against simply booking a tune-up each fall. Read what it includes: which parts are cleaned and tested, whether filters are supplied, how emergency calls are handled and how the plan renews or can be cancelled.

Keep every invoice. Some manufacturer warranties require proof that the furnace was installed and serviced as the manual specifies. A service history also helps the next technician spot a recurring problem, and it reassures a buyer when you sell the house.

A furnace that burns gas, propane or oil produces carbon monoxide, a gas you can't see or smell. Maintenance is one of the main defences, because a tune-up examines the parts most likely to let it escape: the heat exchanger, the venting and the combustion itself. Health Canada recommends checking fuel-burning appliances for leaks, cracks, blocked vents, poor connections and corroded or disconnected vent pipes, and inspecting exhaust vents during and after snowstorms.

Only an alarm can detect the gas. Health Canada names hallways outside sleeping areas as the most important place for a carbon monoxide alarm, and advises testing alarms regularly and replacing them when they reach their expiry date.