How to Prepare Your Home for a Heat Wave in Ontario

Hot summer weather has started to arrive in Ontario, and for many homeowners, this is the time when the air conditioner goes from nice to have to absolutely essential. When outdoor temperatures climb into the high 20s or low 30s, your home can heat up quickly, especially if your AC system has not been checked since last summer.

If you want help getting your cooling system ready, Comfort Next is a trusted HVAC company in Aurora, providing professional air conditioning and home comfort services for local homeowners.

How Do You Prepare Your Home for a Heat Wave?

To prepare your home for a heat wave, start by testing your air conditioner, checking or replacing the air filter, clearing the outdoor AC unit, checking airflow from vents, setting your thermostat properly, closing blinds during peak sun hours, using ceiling fans correctly, and watching for warning signs like warm air, weak airflow, unusual noises, or short cycling.

1. Test Your Air Conditioner Now, Not Later

If the weather has already started to feel hot, do not wait for the next extreme heat warning to test your AC. Turn your thermostat to cooling mode and set it a few degrees below the current indoor temperature. Let the system run for 15 to 20 minutes.

2. Replace or Check Your Air Filter

A dirty air filter is one of the most common reasons an AC system struggles during hot weather.

3. Clear the Area Around the Outdoor AC Unit

Your outdoor AC unit needs open space to release heat from your home. If the unit is surrounded by grass, weeds, leaves, branches, garden tools, or outdoor furniture, airflow can become restricted.

4. Check Airflow From Every Vent

During a heat wave, poor airflow can make your home feel uncomfortable even if the AC is running.

5. Set Your Thermostat Properly During Hot Weather

When the house feels too warm, many people set the thermostat extremely low, hoping it will cool the home faster. In most cases, this does not make the AC cool faster. It simply makes the system run longer.

Heat Wave Home Preparation Checklist

Use this checklist to get your home ready for hot summer weather: Test your AC, replace your air filter, clear debris around the outdoor unit, keep vents open, check for weak airflow, set your thermostat to a realistic temperature, close blinds during peak sun, use ceiling fans when rooms are occupied, avoid heat-producing appliances during the hottest hours, and schedule AC maintenance if the system is not performing well.