When Do You Need HVAC Repair or HVAC Maintenance?

Get expert furnace and AC repair and maintenance services in Cornwall when you need it most. Schedule an appointment with an HVAC technician and get full repair or maintenance services for systems of any brand or model by a certified professional. Whether you need routine maintenance or emergency repairs, we've got you covered.

Furnace Repair

✔ You’re experiencing unusual noises or smells from your furnace, or it is otherwise not working as it should.

✔ The temperature isn’t warm enough.

✔ Your furnace keeps turning on and off.

✔ Your furnace shows physical signs of wear and tear such as leaks or cracks.

✔ You’re experiencing any other problems heating and/or maintaining comfort in your home.

AC Repair

✔ You’re experiencing unusual noises or smells from your air conditioner, or it is otherwise not working as it should.

✔ The temperature isn’t cool enough.

✔ Your AC keeps turning on and off.

✔ Your AC shows physical signs of wear and tear such as leaks or cracks.

✔ You’re experiencing any other problems cooling and/or maintaining comfort in your home.

HVAC Maintenance

✔ Your HVAC system is under 10 years old and running well.

✔ You want to prolong the life of your existing furnace and/or air conditioner.

✔ You want to identify and prevent potential issues with your HVAC equipment.

✔ Includes a 21-point inspection.

When Will My HVAC Technician Recommend Replacement?

Upon completing their assessment, your HVAC technician may determine replacement is a more appropriate and/or cost-effective option than repair. If so, the Home Depot’s local HVAC experts are ready to help. They will recommend a new system for your home and, upon your approval, arrange to install it.*

*Should you decide to go ahead with HVAC replacement, your diagnostic fee will be waived.

Here’s How It Works

Enjoy peace of mind with our HVAC Repair & Maintenance Services by our licensed technicians in Cornwall.

Diagnosis

Your HVAC technician will ask questions about your HVAC system and perform a diagnostic check.*

Quote

Your technician will discuss their findings with you, provide a quote, then draft a work order and get your consent.

Installation & Inspection

Your technician will perform the repair or maintenance, test the HVAC unit and complete the work as recommended.

Quality Work Guaranteed

Home Depot HVAC professionals are licensed technicians with the experience to repair or maintain all brands and models of HVAC systems.

*Please note that a standard diagnostic fee will apply for your HVAC repair and maintenance services visit


21-Point Inspection* with your HVAC Maintenance Services in Cornwall

When it comes to HVAC unit maintenance, every point counts. During your visit, our HVAC professional will a detailed inspection and servicing of your system to ensure optimal performance. This includes:

1. Check thermostat (function, settings, location)

2. Check lubricate/furnace fan motor (as applicable)

3. Check blower motor amps (as applicable)

4. Check filter system (clean/replace if needed)

5. Check contactor (clean as required)

6. Inspect condenser fan motor and blades

7. Check condenser coil (clean as required)

8. Check compressor

9. Check refrigerant pne temperature

10. Check evaporator temperature drop

11. Check humidifier damper position

12. Check condensate pump/lines (clean as required)

13. Inspect electrical connections (tighten, clean as required)

14. Check capacitors (for leakage function)

15. Check electrical loads/current draw

16. Clear debris from condenser

17. Inspect service valve

18. Clean blower (removal of blower not included)

19. Inspect evaporator coil (clean as required if accessible)

20. Locate/identify system switch and/or breaker

21. Check and advise on performance and air distribution

*Please note that a standard diagnostic fee will apply for your HVAC repair & maintenance services visit

Current Offers

FREE 10 Year Labour Warranty with the purchase of any Furnace, Air Conditioner, Heat Pump or Ductless System

When purchased and installed through Home Services (Value of $1000)
Call 1-800-Home Depot (1-800-466-3337) for a free in-home consultation or see store associate or Special Services Desk for details.

Book Now

*Off our current ticketed prices. Offer valid through The Home Depot Home Services in Canada only. Not valid in combination with Local Pro. Some exceptions may apply. Not valid in combination with any other offer. Offer valid for contracts signed during promotion period. Installation must be completed by March 4, 2026. Offer valid to Canadian residents only. We reserve the right to limit quantities to the amount reasonable for homeowners and our regular contractor customers. Call 1-800-Home Depot (1-800-466-3337) for a free in-home consultation. See store associate for details.

Frequently Asked Questions

Why isn’t my air conditioner or furnace working?

If your air conditioning unit isn’t working, it could be a refrigerant leak, a broken compressor or coil, or even a broken blower motor in your furnace or air handler preventing cooled air from making it to the rest of your home. If your furnace isn’t working, it could be due to a broken heat exchanger or blower motor, or even a dirty air filter in need or replacement.

A Home Depot Installer, experienced in heating repair and AC repair, can identify the problem and get your HVAC system back up and running – or advise other solutions.

How do I know if my AC needs to be replaced?

If you notice any of the following signs, you should consider replacing your A/C:

  • Your A/C is older than 10 years
  • Poor air flow even at maximum setting
  • A/C blows hot air due to low refrigerant or duct vent issues
  • Unpleasant odors resulting from mould or burning electrical components
  • Loud and noisy when in use
  • Faulty thermostat
  • Leaking refrigerant due to a blocked drain line. This is a serious issue that should be repaired promptly because refrigerant is poisonous.

My air conditioner is 7 years old and runs constantly. Can it be repaired?

HVAC repair should be the first option for a 7-year-old air conditioner or other HVAC system that is not functioning properly.

Most HVAC systems, whether it’s an air conditioner, gas furnace or heat pump, can be expected to last 10-20 years with regular HVAC service. Normally, a 7-year-old air conditioner would only be half-way through its product life cycle. In many cases, it may still be under warranty.

How often should I replace my HVAC system?

Depending on the frequency of use and maintenance, the Natural Resources of Canada recommends replacing your HVAC system every 10 – 15 years.

What is the average lifespan of a HVAC system?

On average, an air conditioner or heat pump should provide 10 – 15 years of service with proper maintenance.

A furnace or boiler for heating an entire home should provide 15 -20 years of service with regular maintenance.

How long do furnaces last on average?

Depending on the humidity level in your home, frequency of use and maintenance, the average gas furnace has a lifespan of 15 – 20 years.

Should I replace or repair my furnace?

The age of your furnace, frequency of use, humidity levels, and level of maintenance are the key factors that impact your furnace’s performance over time. Even the best, most energy efficient brands of furnaces, however, experience wear and tear with increased use.

Here are 3 signs that you need to replace or repair your furnace:

1. If your furnace is 15 years or older, consider replacing your furnace with a new energy-efficient model. Even if your warranty indicates a lifespan of 20 years, the frequency of repairs may increase over that time. Your furnace will also become increasingly less energy efficient and more costly to operate if it is older than 15 years and in need of repair.

2. If your existing furnace is 10 years or older, repairs and regular maintenance can extend the life of your furnace a few more years. Check the warranty to review your coverage before purchasing a new furnace.

3. If your furnace is less than 10 years old and you are experiencing issues, a professional HVAC repair service can likely resolve the issue for less than the cost of a new furnace.

How often should I service my HVAC system?

Scheduling annual or bi-annual HVAC service appointments is one of the best ways to protect your furnace, air conditioner or heat pump.

Booking regular HVAC maintenance appointments helps ensure your HVAC system runs smoothly, identify any problems before they get worse and reduce the likelihood you’ll need any costly HVAC repairs.

How can I avoid repairs to my HVAC system?

You can’t guarantee that your system will never need repairs, but changing out your air filters once every 3-6 months, ensuring that your outside unit is unobstructed, and keeping all vents indoors clear of blockage are good ways to ensure the long-term health of your HVAC unit.

What is done during my HVAC maintenance appointment?

Your HVAC technician will perform a comprehensive, 21-point inspection of your systems. They will check for any signs of leaks, problems with connections and wiring, problems with valves or caps, filters, coil cleaning, and more.

How often do I need HVAC maintenance in Cornwall?

  • Scheduling annual or bi-annual service appointments is the best way to protect your HVAC systems.
  • Some technicians in Cornwall recommend getting HVAC service done twice a year – once in the spring and once in the fall.
  • Booking regular maintenance appointments means ensuring your systems are running smoothly, and getting problems identified quickly to prevent them from getting worse.

Why do I need HVAC maintenance?

HVAC maintenance helps to detect any current problems and do a tune-up, increase the safety of your HVAC systems, and increase the longevity of your equipment.

How do I test my HVAC system?

  • For air conditioners, you can examine your thermostat by making sure your system is set to “heat” or “cool” and that the set temperature is high or low enough to trigger the system.
  • You can check outside units and test the temperature and efficiency by placing a thermometer on the supply register and taking a reading at the return vent.
  • For other systems, you can take readings using a multimeter.

How much should HVAC maintenance cost in Cornwall?

  • Some HVAC contractors in Cornwall charge an hourly fee, while others charge a flat fee for their services.
  • A Home Depot licensed HVAC technician in Cornwall will provide any professional recommendations and an estimate for your furnace and AC maintenance appointment before any work is done.

How long does HVAC maintenance take?

  • In addition to your diagnostics and assessment, the time to complete your AC and furnace maintenance depends on the number of systems you have, the size of your home, and how long it has been since your previous HVAC servicing and maintenance appointment.
  • Your HVAC technician can provide a more accurate time after your consultation.

What is HVAC preventative maintenance?

  • Preventative AC and furnace servicing helps to keep your heating and cooling systems running effectively with no breakdowns or other issues.
  • Maintenance helps tackle immediate problems while also preventing any problems in the future to help the long-term health of your HVAC unit.

Is there anything I should do before my appointment with my HVAC contractor in Cornwall?

  • Ensure a clutter-free environment so the technician can access the equipment.
  • Make sure any outdoor units are accessible and there are no locks on the gates to the backyard.