maple air

The Most Common AC Issues in Toronto Summers (And How to Avoid Them)

July 18, 2025

The Most Common AC Issues in Toronto Summers (And How to Avoid Them)

Toronto summers can be brutally hot, making your air conditioner not just a luxury, but a necessity. However, with the increased demand placed on your AC system, breakdowns and inefficiencies become common. Knowing the most frequent issues and how to prevent them can save you from discomfort and unexpected repair bills.

1. Clogged Air Filters
One of the most overlooked problems is a dirty or clogged air filter. When the filter is filled with dust and debris, airflow becomes restricted, causing your AC to work harder and less efficiently. Replace or clean your filters every 1–2 months during heavy-use periods to maintain optimal performance.

2. Low Refrigerant Levels
If your AC is blowing warm air or not cooling as it should, low refrigerant could be the issue. This could be due to a leak, which requires immediate professional attention. Regular maintenance checks can help identify refrigerant issues early before they escalate into major repairs.

3. Thermostat Malfunctions
Sometimes the problem isn’t with your AC unit but the thermostat. Whether it's an outdated model or incorrectly calibrated, a faulty thermostat can cause inconsistent cooling. Consider upgrading to a smart thermostat for better control and efficiency.

4. Frozen Evaporator Coils
Frozen coils can reduce your AC’s cooling ability and potentially damage the compressor. This can be caused by restricted airflow or low refrigerant. Routine inspections and keeping vents unobstructed help prevent this issue.

5. Electrical Failures
Summer storms and frequent AC use can cause electrical components like capacitors and relays to fail. If your unit is constantly cycling on and off or doesn’t start at all, a professional diagnosis is needed.

6. Dirty Condenser Coils
Your outdoor unit's condenser coils release heat removed from your home. When these coils are dirty, your system has to work harder, increasing energy use and wear. Schedule annual AC maintenance to ensure coils are clean and functional.

Preventative Maintenance Is Key
The best way to avoid AC issues is to schedule regular tune-ups. Maple Air offers professional HVAC maintenance services tailored to the unique needs of Toronto homes. We inspect every component, clean vital parts, and ensure your system is running at peak efficiency.

Stay Cool This Summer — Contact Maple Air Today
Don’t wait for a breakdown to think about your air conditioner. Let the highly skilled team at Maple Air keep your system running smoothly all summer long.

Call us today to book your AC service appointment!


Back to all blogs
Background Image

Most Trusted HVAC Service in Toronto

Certified technicians in Toronto

Our professional business environment is powered by our experience and expertise in the field of heating, ventilation, and air conditioning.

24 Hour Emergency Repair in Toronto

Our knowledgeable service team is fully dedicated to help you with any heating or cooling emergencies.

Same Day Service in Toronto*

At Maple Air we have the resources and support to provide all our customer with fast and reliable service.

Flat Rate Service Pricing

To simplify and help our customers save on repair cost, we have developed an in-house Honest & Flat Rate Pricing on all repairs - No hidden charges!

Maple Air Awards

Presidents Award
Homestars Award
Homestars Award