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Air Conditioner Not Working Ottawa: Your Guide on What to do.

As the temperatures rise in Ottawa, ensuring your air conditioning (AC) unit is in top working condition becomes essential for maintaining a comfortable home. At AirZone HVAC Services Ottawa, we understand the frustration of an AC unit that isn’t performing as it should. While some minor issues can be resolved on your own, there are times when calling in a professional is necessary. In this article, we’ll guide you through some basic troubleshooting steps you can take and explain why it’s important to rely on experts like us for more complex issues.

Rheem central air conditioner installed by cooling contractor AirZone HVAC Services in Richland, ON (spring 2024).
Rheem central air conditioner installed by cooling contractor AirZone HVAC Services in Richland ON spring 2024

Basic AC Troubleshooting Steps for Homeowners

Before reaching for the phone, there are a few simple checks you can perform to potentially get your AC unit up and running again:

  1. Check the Thermostat Settings: Ensure your thermostat is set to the cooling mode and the temperature is set lower than the current room temperature. Sometimes, the issue is as simple as an incorrect setting.
  2. Inspect the Air Filter: A clogged or dirty air filter can restrict airflow and cause your AC to work inefficiently or even shut down. Check the filter and replace it if it’s dirty. We recommend changing your filter every 1-3 months during peak usage.
  3. Examine the Circuit Breaker: Your AC unit might have tripped the circuit breaker. Locate your home’s electrical panel and check if the breaker for your AC is in the “off” position. If it is, reset it to “on”.
  4. Check the Vents and Registers: Make sure that all vents and registers are open and not blocked by furniture or other objects. Proper airflow is crucial for your AC to function correctly.
  5. Inspect the Outdoor Unit: Clear away any debris, leaves, or obstructions around the outdoor unit. Ensure that there’s at least two feet of clearance around it for optimal performance.
  6. Listen for Unusual Noises: Strange noises like grinding, squealing, or banging can indicate mechanical issues. While this step won’t fix the problem, it can give you a clue about what might be wrong.

Why It’s Important to Call a Professional

While the steps above can help resolve minor issues, there are times when professional intervention is necessary. Here’s why:

  1. Safety Concerns: AC units involve complex electrical components and refrigerants. Handling these without proper training can be dangerous. Professionals have the knowledge and equipment to handle repairs safely.
  2. Preventing Further Damage: Attempting to fix more serious issues on your own can sometimes cause more harm than good. Professionals can accurately diagnose and fix problems, preventing further damage and costly repairs.
  3. Expertise and Experience: HVAC professionals have extensive training and experience in diagnosing and repairing AC units. They can quickly identify the root cause of the problem and provide effective solutions.
  4. Warranty Protection: Many AC units come with warranties that require professional maintenance and repairs. DIY fixes can void these warranties, leaving you responsible for the full cost of future repairs.
  5. Efficiency and Longevity: Professional maintenance ensures your AC unit runs efficiently, reducing energy costs and extending its lifespan. Regular tune-ups by professionals keep your system in peak condition.
FREE central air conditioner or heat pump annual maintenance through the Coolsaver Rebate program available to Ottawa Residential customers.
FREE central air conditioner or heat pump annual maintenance through the Coolsaver Rebate program available to Ottawa Residential customers

Common AC Issues and How We Can Fix Them

At AirZone HVAC Services Ottawa, we have extensive experience addressing a wide range of AC issues. Here are some common problems homeowners face and how we can help:

  1. Refrigerant Leaks: Low refrigerant levels can cause your AC to blow warm air. We can locate and repair leaks, recharge the refrigerant, and ensure your system is sealed and functioning correctly.
  2. Faulty Compressors: The compressor is the heart of your AC system. If it’s not working, your AC won’t cool properly. We can diagnose compressor issues and perform necessary repairs or replacements.
  3. Frozen Evaporator Coils: Frozen coils can result from low refrigerant levels or poor airflow. We’ll identify the cause, thaw the coils, and address the underlying issue to prevent it from recurring.
  4. Electrical Problems: Faulty wiring, capacitors, or contactors can prevent your AC from turning on or cause intermittent issues. Our technicians can safely diagnose and repair electrical problems.
  5. Sensor Issues: If your AC is cycling on and off frequently, it could be due to a faulty thermostat sensor. We’ll inspect the sensor and recalibrate or replace it as needed.
  6. Drainage Problems: Clogged condensate drains can cause water damage and affect your AC’s performance. We’ll clear any blockages and ensure proper drainage.
  7. Fan Issues: Problems with the fan can lead to inadequate cooling and reduced airflow. We’ll inspect the fan motor and blades, and perform necessary repairs or replacements.
Ductless heat pump installation requiring a lift!
Ductless heat pump installation requiring a lift


While there are simple steps you can take to troubleshoot your AC unit, it’s important to know when to call in the professionals. At AirZone HVAC Services Ottawa, we are committed to providing top-notch service to ensure your AC operates efficiently and reliably. Our team of experienced technicians is ready to handle any AC issues you may encounter, ensuring your home stays comfortable throughout the hot Ottawa summers.

If you’re experiencing problems with your AC unit, don’t hesitate to contact us. We’re here to help you keep your home cool and comfortable, no matter the season.

Amana ASX16 Central Air Conditioner installed in Ottawa, Ontario by heating and cooling experts AirZone HVAC Services.

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