Key takeaways
Cost
$120 – $200 per system, so roughly $240 – $400 a year for a furnace and a central AC.
What it prevents
The small failures, like a weak capacitor, dirty flame sensor or clogged drain, that cause most no-heat and no-cooling calls.
Efficiency
A clean, adjusted system runs shorter cycles to do the same job.
Warranty
Manufacturers generally expect equipment to be maintained, and dated service records are your proof.
Safety
A licensed gas technician checks the furnace for carbon monoxide risks every visit.
Timing
Furnace in September or October, AC in April or May.
Tune-up cost vs typical repair costs
The simplest way to judge whether regular HVAC maintenance is worth it is to compare the yearly cost with the repairs it helps you avoid or catch early.
| Item | Typical Ottawa cost |
|---|---|
| Furnace or AC tune-up | $120 – $200 per system |
| Common furnace repair (igniter, flame sensor, pressure switch) | $150 – $900 |
| Major furnace part (blower motor, control board, inducer) | $600 – $2,000 |
| Common AC repair (capacitor, contactor, drain, fan motor) | $150 – $1,200 |
| AC compressor replacement | $1,800 – $3,500 |
| Central air conditioner replacement | $4,000 – $8,000 |
| High-efficiency gas furnace replacement | $4,500 – $8,500 |
A tune-up won’t prevent every breakdown. But a $150 capacitor caught in May is a lot cheaper than a capacitor that fails in a July heat wave and takes the compressor with it, or an emergency call on a −25 °C night. Prices are typical ranges, not quotes; the final cost depends on the home and equipment, and Oria gives free quotes on any equipment purchase.
Why maintenance matters more in Ottawa
Ottawa’s climate works HVAC equipment hard at both ends of the year. A furnace can run most of the day from November to March through cold snaps of −25 °C to −30 °C. An air conditioner then works through humid 30 °C summers with a humidex of 35 to 40.
Furnaces
Long run times wear igniters, inducer motors and blower bearings, and dust builds up on flame sensors and burners.
Air conditioners
June cottonwood fluff mats the outdoor coil, and heat stress weakens capacitors and contactors.
Venting
High-efficiency furnaces vent through plastic pipes on the side wall, which can be blocked by snow and ice.
Humidifiers and HRVs
Pads, filters and cores clog over a season and need yearly attention.
Efficiency: where the savings come from
A 96% AFUE furnace or a high-SEER2 air conditioner only delivers its rated efficiency when it is clean and set up correctly. A clogged filter, dirty coil, low refrigerant charge or poorly adjusted burner makes the system run longer to deliver the same heat or cooling.
Longer run times show up on your Enbridge gas and Hydro Ottawa bills, and they add hours of wear to motors and compressors. Savings vary from home to home, so be wary of anyone promising a fixed percentage. The honest case is that a maintained system runs as designed, and a neglected one slowly drifts from it.
See our guide to saving on utility bills for other ways to cut costs.
Warranty requirements, in general terms
Manufacturer warranties on furnaces, air conditioners and heat pumps generally expect the equipment to be installed and maintained according to the manufacturer’s instructions. Many also require the equipment to be registered after installation to get full parts coverage.
If a major part fails under warranty, the manufacturer or installer may ask how the system has been cared for. Dated service records from a licensed contractor are the simplest proof. Terms vary by brand and model, so read your own warranty document, and keep every tune-up invoice with it.
Safety: carbon monoxide and gas appliances
This is the part of maintenance that isn’t really about money. A gas furnace produces carbon monoxide as it burns fuel. A cracked heat exchanger, a blocked vent or poor combustion can let that gas into your home.
At every furnace visit, a licensed gas technician should inspect the heat exchanger, venting and safety controls and check combustion. TSSA regulates fuel-burning appliances and gas work in Ontario, and annual inspection of gas appliances by a qualified contractor is the standard recommendation.
CO alarms
Required near sleeping areas in every home with a fuel-burning appliance. Test them monthly.
Vents
Keep side-wall furnace and water heater vents clear of snow after every storm.
Warning signs
Headaches or nausea that ease outside, a yellow flame or soot. Leave the house and call 911 if the alarm sounds.
Read our furnace carbon monoxide safety guide for more.
What a maintenance visit covers
Furnace tune-up (fall)
- Inspect the heat exchanger, burners, igniter and flame sensor
- Check venting, gas pressure and combustion
- Test safety switches, limit controls and the pressure switch
- Check the blower, motor amp draw and filter
- Test for carbon monoxide
AC tune-up (spring)
- Clean the outdoor coil and check the fins
- Test the capacitor and contactor, and tighten electrical connections
- Check refrigerant pressures and temperature drop across the coil
- Clear the condensate drain and test the pump
- Check the outdoor fan, pad level and line insulation
Our furnace maintenance checklist also covers the jobs you can do yourself between visits.
Don’t forget the rest of the system
Furnace and AC tune-ups get the attention, but the smaller equipment around them fails too, and it is often cheap to look after during the same visit.
Furnace humidifier
Replace the water panel each fall and check the valve and drain. A crusted pad does nothing, and a stuck valve can leak.
HRV or ERV
Clean the filters and core and check that the outdoor hoods aren’t blocked by snow, frost or lint.
Tank water heater
Flush sediment and test the relief valve once a year. Rural well-water homes in Greely, Richmond or Kemptville often see faster scale build-up.
Tankless water heater
Needs a descale flush, especially on hard water.
Ask for these to be added when you book; it saves a separate trip.
When is maintenance less worth it?
Being honest about it helps you spend wisely.
An old system near the end of its life
A tune-up won’t add many years to a 20-year-old furnace. A gas safety check is still worth it, and the visit is a good time to plan a replacement.
Brand-new equipment
The first year still matters, mainly to confirm the install and start your warranty records.
Skipping filter changes
A professional visit can’t make up for a filter left in for a year. Change it every 1–3 months.
Maintenance plans and booking
A home with a furnace and a central AC typically books two visits a year. If you’d like your visits scheduled and reminders handled for you, ask about our HVAC maintenance plans; we’ll explain what’s included for your equipment when you call.
If a tune-up finds a worn part, you’ll see what we found and get a price before any repair. B R summed up working with us: “Mansoor and team has been very responsive, reliable and always providing top notch HVAC service with reasonable pricing.”
Call (613) 866-1869 to book furnace maintenance or AC maintenance. Oria is TSSA and HRAI approved, and every technician holds gas and refrigeration licences.
Frequently Asked Questions
How much does HVAC maintenance cost in Ottawa?
A furnace or air conditioner tune-up in Ottawa typically costs $120 to $200 per system. A home with a gas furnace and a central AC usually books two visits a year, one in the fall and one in the spring, for roughly $240 to $400 in total. Water heater, humidifier and HRV service can often be added to a visit.
How often should I service my furnace and AC?
Once a year each. Book the furnace in September or October, before the first cold snap, and the air conditioner in April or May, before the first heat wave. A heat pump needs both a heating and a cooling check. Between visits, change the furnace filter every one to three months.
Does skipping maintenance void my warranty?
It can affect a claim. Manufacturer warranties generally expect equipment to be installed and maintained according to the manufacturer’s instructions, and a manufacturer or installer may ask for maintenance records if a part fails. Terms vary by brand and model, so read your warranty document and keep dated invoices from each tune-up.
Can a tune-up prevent carbon monoxide problems?
It is one of the best defences. At a furnace tune-up, a licensed gas technician inspects the heat exchanger, venting and combustion, which is where carbon monoxide problems start. It doesn’t replace CO alarms, which are required near sleeping areas in Ontario homes with fuel-burning appliances. Test your alarms monthly and replace them as the manufacturer recommends.
Is HVAC maintenance worth it for an older furnace?
Usually yes, but for different reasons. A tune-up won’t make a 20-year-old furnace new, but the gas safety check matters more as heat exchangers age. The technician can also tell you how close the furnace is to replacement, so you can plan for it instead of facing an emergency on a −25 °C night.
What can I do myself between tune-ups?
Change the furnace filter every one to three months, keep the outdoor AC unit clear of leaves, grass and cottonwood fluff, keep side-wall vents clear of snow, and pour a little vinegar into the condensate drain each spring. Test carbon monoxide and smoke alarms monthly. Leave gas, electrical and refrigerant work to a licensed technician.
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