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Air Conditioner Repair Troubleshooting (DIY)

Air conditioning repairs are often necessary at the worst possible time! In Ottawa, cooling units tent to stop working during the dog days of summer when he heat and humidity are at their highest. An air conditioner diagnostic is completed to see what is wrong with the unit and what is necessary for repair. This can range from a simple AC repair to extensive work such as a compressor replacement.


This article offers some do it yourself (DIY) tips that you can try prior to calling a cooling company. And if you do need additional help we encourage you to reach out to us! We offer exceptional response times and offer cooling repair services to the greater Ottawa area including Pembroke and the Valley (as far as Deep River).

Air Conditioner Repair Checklist (DIY)

Check the furnace filter. A plugged furnace filter will not allow air to pass over the indoor portion of the air conditioner (evaporator coil). This can cause freeze-ups, water spillage, and other catastrophic failures.

Clogged Air Conditioner Filter

Check the breaker panel. An overworked air conditioner can trip a breaker causing the unit to stop.

Breaker Panel AC

Check your outdoor disconnect switch. This switch is a breaker for the outdoor unit and may just be disconnected.

Disconnect Switch for Air Conditioning Unit

Ensure outdoor condenser is free of debris and not covered by anything. It is important to ensure the unit is getting the appropriate amount of airflow.

Air Conditioner Repair Ottawa

Check to make sure the tubing or pvc pipe connected to the indoor portion is not plugged. Clogged drains are a very common issue and cause water to pool or collect on top of the furnace and on the floor.

Clogged Furnace / Air conditioner drain pipe

Check the thermostat. Ensure the thermostat is in cooling mode and the temperature is set lower than the current indoor reading. Furthermore, it is important to ensure the batteries in the control are not dead.

Check your furnace switch. Many people forget that the furnace is the driving force for your home’s cooling. If the furnace switch is off, it will not be able to distribute the cold air throughout your home.

Still Having Cooling Issues With Your Air Conditioner?

If you have followed these steps and are still having issues such as no cooling, system blowing hot air, loud air conditioner, or unit turning on and off it may be time to call a professional. At AirZone HVAC Services we perform air conditioner repair in Ottawa, Kanata, Barrhaven, Orleans, Stittsville, Gloucester, Manotick, Nepean, Carp, Dunrobin, Carleton Place, Pembroke, Petawawa, Deep River, Cobden and Rockland.


Air conditioning repairs can generally be diagnosed quickly and many times can be fixed on the spot. If you are having any issues mentioned above please call 613 592 5770 to schedule a service or repair.