Heating & Cooling Repair & Diagnostics Ottawa
Find the right service for your heating or cooling problem
Start with the right service visit
When your home is too cold, too warm or your equipment behaves differently, AirZone can help you find out why. We diagnose and repair furnaces, air conditioners, heat pumps, boilers, ductless systems and related controls across Ottawa.
We investigate the problem and help you understand the available repair options, so you can choose your next step with clear information.

Serving Ottawa homeowners since 2005
What needs attention?
Choose the heating or cooling route for more detail. If you’re unsure which equipment is causing the problem, tell us what you notice when you book.
Heating problems
No heat, ignition trouble, weak airflow, unusual noises or repeated stopping can affect furnaces, heat pumps, boilers and ductless heating. Thermostat and control problems can also affect comfort.
Explore heating repairs and diagnostics
Know your equipment? See furnace repair or heat pump repair.
Cooling problems
Warm air, weak airflow, ice, leaking water, electrical faults, short cycling or a system that won’t start can call for a diagnostic. We help with air conditioners, heat pumps and ductless cooling.
Explore cooling repairs and diagnostics
For a heat pump affecting heating, cooling or both, see heat pump repair.
A local team that explains your options
In-house technicians
Your equipment is assessed by AirZone’s directly employed technicians, with a local team to contact about your service.
Clear findings and pricing
We examine the equipment, test where needed and provide a written explanation of the issue. Recommended repair work is quoted before it begins.
Help with the next decision
We explain the repair options so you can consider your equipment’s condition, repair history and comfort needs. You can ask questions and weigh the recommendations before deciding how to proceed.
Diagnostic, repair or maintenance?
Diagnostic service
A technician visits your home, examines the equipment and performs the necessary tests. You receive written findings and a repair quote if work is recommended.
The diagnostic fee covers the technician’s time to visit and investigate. It does not include repair work.
Repair service
Repair work follows the written quote and may involve replacing a part. Pricing is provided before work begins.
If a part is covered by warranty, its cost is deducted from the repair total. After-hours repairs are billed at a higher rate.
Maintenance service
Routine service cleans and checks working equipment, including calibration and safe operation. If a problem is discovered, diagnostic or repair work may also be needed.
Heating and cooling service rates
From $149 per hour, plus HST
Higher rates apply after hours, on statutory holidays and for emergency service. This is a starting hourly rate, not a fixed diagnostic or repair total. Ask our team which rate applies to your appointment.
Family Maintenance & Protection Package members can save on diagnostic, repair and maintenance services. See current packages and benefits.
Call to discuss emergency service
For urgent heating or cooling problems, call 613-592-5770. Tell us what’s happening so our team can discuss availability, the applicable rate and next steps.
HVAC service questions
Should I book maintenance or a diagnostic?
Book a diagnostic when your equipment is not heating or cooling properly, leaks, freezes, makes unusual noises or starts unreliably. Maintenance is for working equipment that needs routine cleaning, calibration and safety checks. If a fault is found during maintenance, additional diagnostic or repair service may be needed.
How is a diagnostic visit charged?
Heating and cooling diagnostic service starts from $149 per hour plus HST. Higher rates apply after hours, on statutory holidays and for emergency service. The diagnostic fee covers the technician’s time to visit your home and investigate the issue; repair work is separate. Ask the team which rate applies when arranging your visit.
How long will diagnosis and repair take?
Timing depends on the equipment, symptoms and testing needed. Some repairs can be completed during the visit when the required part and time are available. A special-order part, additional labour or a larger repair may require another appointment. Your technician will explain whether work can be completed during the visit or needs a return appointment.
Does an equipment warranty cover the visit?
Coverage depends on the equipment, its age, the manufacturer’s terms and the cause of the problem. Parts, labour and diagnostic work may have different coverage. Share your warranty information so the team can review it. If a replacement part is covered by warranty, its cost is deducted from the repair total.
How do I decide between repair and replacement?
Consider the system’s age, condition, repair history, efficiency and comfort performance alongside the repair cost and replacement options. A diagnostic provides findings and a written repair quote to help you compare the next steps. AirZone can also help you explore replacement equipment when that is appropriate.
Is a replacement quote the same as a diagnostic?
A diagnostic investigates a problem with equipment you already have. A replacement quote helps you plan a new system. If your current equipment is not working and you want to understand the cause or repair options, request a diagnostic service visit. If you are planning new equipment, request a replacement quote.
Tell us what’s changed
Have the equipment type, model and any error message handy if you can. Let us know when the problem began and whether it affects one room or your whole home.
Planning new equipment? Request a replacement quote.