7 Air Conditioner Mistakes Costing You Money This Summer — How to Save

Beat the Heat Without Breaking the Bank: 7 Air Conditioner Mistakes Costing You Money

As summer temperatures climb across Canada, your air conditioner is working overtime—and so is your wallet. But here’s the good news: you can cut your electricity bill by up to 10% just by avoiding a few common mistakes.

That’s according to HVAC expert Simon Bernath of FurnacePrices.ca. With energy prices staying high, these simple fixes can keep your home comfortable without the shock of a huge bill.

What This Means for You

If your summer electricity bill is typically $200 per month, a 10% saving means $20 back in your pocket each month. Over a three-month cooling season, that’s $60 saved—just by changing a few habits.

The 7 Mistakes Costing You Money

Here are the top errors Canadians make, according to Bernath:

1. Leaving windows open while the A/C runs – This lets cool air escape and forces your unit to work harder.
2. Not closing blinds or curtains – Sunlight heats up your home, making your A/C fight against solar gain.
3. Using an old, manual thermostat – Without scheduling or remote control, you’re cooling an empty house.
4. Setting the thermostat too low – Cranking it to 18°C wastes energy. Your A/C doesn’t cool faster, it just runs longer.
5. Neglecting air filter changes – A dirty filter blocks airflow, reducing efficiency by up to 15%.
6. Running the A/C all day – Even when no one is home, you’re paying to cool empty rooms.
7. Ignoring window film or blackout curtains – These passive cooling tools can lower indoor temperatures naturally.

How to Save: Simple Fixes That Work

Bernath recommends these practical steps:

• Close all windows when the A/C is on. Only open them at night if it’s cooler outside.
• Pull down blinds or curtains on sun-facing sides of your home, especially south and west windows.
• Switch to a smart thermostat. These devices let you schedule temperature changes and adjust settings remotely. They can save at least 10% on energy costs.
• Set your thermostat to 23–24°C during the day and cool it down before bedtime. This balance keeps you comfortable without wasting energy.
• Change your air filter every 1–3 months during peak cooling season.
• Install window film or blackout curtains to block heat before it enters your home.

Who Is Affected

This advice applies to every Canadian household that uses air conditioning—whether you have central A/C, a window unit, or a portable unit. Renters and homeowners alike can benefit. If you pay for electricity, these tips will lower your bill.

What You Should Do

1. Check your thermostat – If it’s old and manual, consider upgrading to a smart model (starting around $30–$50).
2. Close windows and blinds before turning on the A/C.
3. Set your thermostat to 23–24°C during the day.
4. Change your air filter if it’s been more than a month.
5. Look into window film or blackout curtains for sun-facing rooms.

Bottom Line

You don’t need to suffer through a hot summer or pay a fortune to stay cool. By avoiding these seven common mistakes, you can reduce your electricity bill by up to 10% and keep your home comfortable. With energy prices staying high, every dollar counts. Make these small changes today—your wallet will thank you.