Furnace repair in Waterdown

Start here, because this matters more than heat. If you smell gas, that rotten-egg smell added to natural gas and propane, do not touch light switches, the thermostat or the furnace switch. Get everyone outside, then call the gas utility's emergency line or 911 from outside or from a neighbour's house. Do not go back in until you are told it is safe.

If a carbon monoxide alarm sounds, treat it as real even if nobody feels ill. Headaches, nausea and drowsiness that ease when you leave the house are warning signs. Get everyone out, call 911, and leave the furnace off until a gas technician has checked it. The Ontario Fire Code requires a working carbon monoxide alarm next to each sleeping area in a home with a fuel-burning appliance, a fireplace or an attached garage, so if yours are missing or past their replacement date, sort that out before the cold sets in.

Plenty of no-heat problems are simple, and you can rule them out in a few minutes. Check that the thermostat is set to heat and a few degrees above room temperature, and change its batteries if it uses them. Make sure the furnace switch, which looks like a light switch on the wall or stairway near the furnace, is on, and that the breaker has not tripped. Pull the filter: one that is grey and packed with dust can make the furnace overheat and shut itself down.

Then go outside. Most furnaces in newer Waterdown houses breathe through two plastic pipes in a side wall, and snow over those pipes makes the furnace stop for safety. The Hamilton RBG climate station near town has a normal of 118.1 cm of snow a year, with 32.4 cm in January alone, and drifts love the side of a house. Clear the pipes by hand, switch the furnace off for a minute and back on. If it still will not run, or the pipes keep icing up, it is time to call.

One thing to avoid: resetting a furnace over and over when it keeps locking out. Two or three tries is enough. After that, leave it off and book a repair.

A minute of cool air at the start of a cycle is normal while the furnace warms up. Cold air that keeps coming usually means the burners have shut off while the blower runs on: a dirty flame sensor, a failed igniter, a condensate drain backed up so the pressure switch opens, or a limit switch tripping because air is not moving well.

Short cycling, where the furnace starts and stops every few minutes, often points to overheating from a blocked filter or closed registers, a flame sensor that cannot prove the flame, or a thermostat sitting too close to a heat source. In some houses the furnace is simply too big for the house, which is a sizing problem rather than a broken part.

Noises each have a short list of causes. Squealing is usually the blower motor. A rattle or hum from the side of the cabinet is often the inducer motor. A loud bang when the burners light can mean delayed ignition, which should be looked at soon. If the furnace lights, shuts down and a small light on the control board starts blinking, it is showing a fault code, and a photo of the blink pattern helps.

It does, and knowing the house before opening the cabinet saves time. In the newer streets of Waterdown South and Waterdown Bay, furnaces are high-efficiency condensing models with plastic side-wall venting and a heat-recovery ventilator. Repairs there are often a frozen or blocked condensate line, a buried vent, or an HRV out of balance that leaves rooms stuffy or dry.

In the post-war and later surveys, such as Glenlea, Buchan Court and Renwood Park, the furnace is often on its second or third replacement and still feeding the original ductwork, which can be undersized for a modern blower. Where the furnace was upgraded and the gas water heater was left venting alone into the old chimney, it is worth checking for backdrafting, which can push combustion gases into the basement.

Older houses around the Griffin Survey and the McMonnies and Stock Survey started out on coal or wood, and many have converted ductwork and unlined masonry chimneys. Condensation from a newer appliance can damage those chimneys, so the venting is part of the repair conversation, not an afterthought.

The technician asks what you have noticed and when it started, then tests the system: the ignition sequence, the flame, the pressure switches, gas pressure, airflow and venting. You are shown what was found and told what it means in plain words.

Before any part is fitted, you get a written price to approve. If a part has to be ordered, you are told what that means for the heat in the meantime, and a furnace that is not safe to run stays off. Work is performed by TSSA-certified gas technicians, and gas and propane appliances are worked on to the CSA B149.1 installation code.

Some homes on the edges of Waterdown are beyond the natural gas main and heat with propane. Tell us which fuel you have when you get in touch, since parts and settings differ.

For a younger furnace with a small fault such as an igniter, a flame sensor or a blocked drain, repair is almost always the sensible choice. When an older furnace has a major failure, such as a cracked heat exchanger, the repair can cost a large share of a new furnace, and you will hear that plainly along with both options. A cracked heat exchanger can let carbon monoxide into the air the blower moves through the house, so that furnace stays off.

With January averaging -4.7 °C at the nearby climate station, the heating season here is long, and small faults tend to show up in the coldest weeks. Regular maintenance catches many of them early and keeps the service records manufacturers ask for on warranty claims. For the bigger decisions, read what goes into the price of a repair or a new furnace or see furnace replacement.