Annual HVAC maintenance in Courtice
A tune-up is worth having because heating and cooling equipment rarely fails without warning — it drifts. Parts degrade measurably for a season or two before they strand anyone, and the point of an annual service is to read those numbers while the system is still running. Metropolitan Heating and Air Conditioning has maintained furnaces, air conditioners, heat pumps and ductless systems since 1979, and serves Courtice households, on all makes and models.
Call (416) 283-5698, Monday to Friday, 8:00 AM to 4:00 PM.
What maintenance is actually preventing
Not much of a service visit is about the future in the abstract. Each task heads off a specific, common failure.
- A flame sensor cleaned before its signal falls below threshold prevents the fire-and-drop-out lockout that strands people in an Ontario winter.
- A condensate drain cleared before biofilm closes it prevents water backing out of the drain pan onto drywall and framing.
- A condenser coil washed before it fouls prevents a compressor running at high head pressure, which is the single hardest thing you can do to an air conditioner.
- A blower wheel cleaned before dust loads its blades restores airflow that has been falling so gradually nobody noticed.
- Electrical connections tightened before they loosen prevent the heat, arcing and pitting that take out contactors and boards.
Temperature rise, and why the nameplate gives a range
Every furnace has a temperature rise range printed on its data plate — the number of degrees the air should gain between the return and the supply. The measurement is simple and the diagnosis is not obvious until you take it.
Read above the range and the furnace is not moving enough air: a restricted filter, blocked returns, duct too small, or a blower running slower than it should. That air is picking up more heat per pass than the exchanger was designed to give it, which shortens the exchanger's life. Read below the range and air is moving too fast for the fire, or the unit is underfiring. Either way the number, not a guess, points at what to correct.
Static pressure: the number most duct systems fail
Static pressure is the resistance a blower works against, measured with a manometer on both sides of the air handler. Residential equipment is typically rated to deliver its nominal airflow against about half an inch of water column in total external static. A great many systems are running well beyond that.
High static is not a nuisance reading. It reduces the air delivered, so rooms will not hold temperature. It raises furnace temperature rise, so the limit trips. It starves a cooling coil, so the coil ices. And it works the blower motor harder for its whole life. It is also the reason why fitting the highest-rated filter you can buy sometimes makes a system worse: a denser media adds resistance, and if a system has no headroom it cannot afford it.
Capacitors fail gradually, and that is measurable
A run capacitor stores and releases charge to keep a motor turning efficiently, and its capacity falls with age. The rating is printed on the can, usually with a tolerance of a few percent. A capacitor measuring well below its rating still starts the motor, so nothing looks wrong — but the motor draws more current, runs hotter, and the failure that eventually follows is often the motor rather than the two-dollar part that caused it. Measuring capacitance annually turns that into a planned replacement.
On the cooling side: superheat and subcooling
Refrigerant charge cannot be judged by pressure alone. Superheat — how many degrees the refrigerant vapour has risen above its boiling point at the suction line — tells you how completely the evaporator coil is being used. Subcooling, the mirror measurement at the liquid line, tells you about the condenser and the charge. Which one matters depends on whether the system uses a fixed orifice or an expansion valve.
Both are compared against the manufacturer's target for that model at the conditions on the day. A reading that has moved since last year is the earliest sign of a refrigerant leak, long before anyone notices the house is not cooling.
What a tune-up cannot fix
Maintenance restores a system to its own design performance. It does not correct a system oversized for the house, ductwork too small for the equipment attached to it, or returns that were never adequate. Those are design problems, and they get addressed properly at replacement, not with a service visit.
Worth knowing: many manufacturers make documented annual maintenance a condition of the equipment warranty, so keeping the records matters if you ever need to claim.
Booking maintenance in Courtice
Call (416) 283-5698 weekdays between 8:00 AM and 4:00 PM, or send us the details. We service furnaces, air conditioners, heat pumps, ductless systems, water heaters and indoor air quality equipment across our service areas, and we also offer maintenance plans. Licensed and insured, all makes and models, from our shop on Venture Drive in Scarborough since 1979.