AC Repair in Kitchener-Waterloo, Cambridge and Guelph

Most air conditioner breakdowns are caused by a failed capacitor or contactor, a refrigerant leak, a dirty coil, or restricted airflow. A trained technician can usually find which one in a single visit.

We repair central air in homes across Waterloo, Kitchener, Cambridge and Guelph, plus townships like Elmira, Breslau, Baden and New Hamburg. Summer heat waves hit every system at once, and that's when weak parts fail. For local detail, see our pages for AC repair in Kitchener, Waterloo, Cambridge and Guelph.

An AC that runs but doesn't cool usually has an airflow problem, a refrigerant problem, or an outdoor unit that isn't running properly. Here's what we see most often:

• Dirty filter or blocked returns. Not enough air across the indoor coil makes it freeze, and a frozen coil can't cool.
• Failed capacitor. The outdoor unit hums but the fan or compressor won't start. It's one of the most common AC failures, and usually a fairly quick fix.
• Bad contactor. The switch that powers the outdoor unit burns or sticks, so it won't start or won't shut off.
• Low refrigerant. An air conditioner doesn't use up refrigerant. If it's low, there's a leak, and topping it up without finding the leak just delays the next call.
• Dirty condenser coil. Cottonwood fluff, grass clippings and dust clog the outdoor coil, and the system can't shed heat on hot days.
• Clogged condensate drain. Water backs up and leaks around the furnace, or a float switch shuts the AC off.

Before you call, check the filter, the thermostat (COOL mode, set below room temperature), both breakers, and the outdoor disconnect switch. If the lines are iced, turn the AC off and run the fan for a few hours to thaw it.

A proper AC diagnosis measures the system instead of guessing. Our technician checks the electrical components, tests the capacitor and contactor, measures refrigerant pressures and temperatures, checks airflow and the temperature drop across the indoor coil, and inspects the condenser coil and condensate drain.

If we find a leak, we'll tell you where it is and whether it's worth repairing. On older systems, a coil or line set leak can cost enough that replacement is the better value.

Repair makes sense for most air conditioners under 10 to 12 years old with a single failed part. Replacement is usually the better call when the compressor fails on an older unit, when there's a major leak, or when the system uses R-22 refrigerant.

R-22 was phased out years ago, so recharging an older system (most installed before about 2010) is expensive. Central air in Ontario typically lasts 12 to 15 years. If you're replacing, it's worth comparing a new AC with a cold-climate heat pump, which cools the same way but also heats and can qualify for rebates. See our AC installation page or the heat pump vs furnace guide.

Typical market ranges in the region: a capacitor or contactor replacement is usually a few hundred dollars, a condenser fan motor several hundred, and a leak repair with recharge can run from several hundred to over $1,500. A compressor replacement on an out-of-warranty unit often costs enough to make replacement worth pricing.

These are typical regional ranges, not our prices. Your quote depends on the part, the refrigerant type, warranty coverage and access. Members of our maintenance membership get 10% off repairs plus an annual condenser coil cleaning, which prevents a lot of summer breakdowns.