This summer, many American families are facing a difficult dilemma: their air conditioning (HVAC) breaks down during a heat wave, repair technicians have no spare parts available, but waiting means living in a home that feels like an oven. Summer electricity demand is forecast to break records, while the shortage of HVAC components that began during the pandemic has still not fully recovered. But here is good news: you do not need to rely entirely on your air conditioner to get through summer. This article will show you how to keep your home cool and reduce your electricity bill — whether your air conditioning is running well or waiting to be repaired.
The solution is not to run the air conditioner harder — it is to prevent heat from entering your home in the first place.
Understanding Why Your Home Gets Hot
Before looking for ways to cool down, you need to understand where the heat in your home comes from. There are three main sources: heat from the sun through your roof and windows, heat from hot outdoor air seeping inside, and heat generated by electrical equipment in your home — stoves, incandescent bulbs, clothes dryers, and even TVs.
Think of your home like a pot. Air conditioning is the lid that keeps it cold. But if the pot has a hole in it (your home has gaps or poor insulation), no matter how good the lid is, it cannot keep the cold in. Therefore, the solution is not just "run the air conditioner harder" — it is to prevent heat from entering your home in the first place.
First Step: Block Heat from Outside
Windows are the biggest "weak point" in most American homes. According to the U.S. Department of Energy, about 76% of sunlight passing through ordinary glass windows will turn into heat inside your home.
Here are some simple and inexpensive measures:
- Blackout curtains or thermal curtains: Close the curtains in west-facing and south-facing rooms in the afternoon. According to the U.S. Department of Energy, thermal curtains can reduce heat from windows by up to 33%.
- Window film: This type of film is applied to glass and reflects heat outward. It costs about 20 to 60 USD per roll, is self-adhesive, and does not require professional installation.
- Exterior shading: If you have an awning or are considering planting trees, this is a very cost-effective long-term investment. Trees shading your walls and roof can significantly lower surface wall temperatures.
Beyond windows, check for gaps around doors and windows. Use your hand to feel — if you sense hot air leaking in, that is a spot that needs to be sealed. Weatherstripping and caulk are available at Home Depot or Lowe's for under 20 USD and work immediately.
Using Fans More Intelligently
Fans do not cool air — they cool people by increasing the rate of sweat evaporation on your skin. This is why running a fan in an empty room does nothing except waste electricity.
But using fans correctly can significantly replace or supplement air conditioning:
Cross ventilation technique: Open windows on opposite sides of your home in the evening and early morning when outdoor temperature is below 24 to 25 degrees Celsius. Point a fan toward one window to push hot air out, and cool air will naturally be drawn in from the other side.
Ceiling fans: Make sure your fan runs counterclockwise in summer (looking up from below, the fan blades push air downward). Most ceiling fans have a reverse switch on the motor. According to the U.S. Department of Energy, ceiling fans help you feel about 4 degrees Fahrenheit (about 2 degrees Celsius) cooler, allowing you to increase your air conditioner setting while staying just as comfortable — thus saving electricity.
Adjust Your Daily Habits That Generate Heat
Many families do not realize that their daily activities are making their homes significantly hotter.
Cooking is a major source of heat. On hot days, prioritize using a microwave, air fryer, or cooking outdoors instead of turning on a traditional oven — ovens can raise room temperature by several degrees for many hours. In Vietnamese households, electric rice cookers, pressure cookers, and induction cooktops generate less heat than gas stoves or traditional ovens.
Incandescent bulbs convert 90% of electricity into heat and only 10% into light. If your home still uses these, switching to LED bulbs is worth doing immediately — it saves electricity and reduces heat at the same time.
Clothes dryers generate a lot of heat. If possible, hang-dry clothes or run the dryer late in the evening.
Getting the Most Out of Your Air Conditioner — Even When It Is "Struggling
If your air conditioner is still running but less efficiently, or you are waiting for it to be repaired, there are several things you can do yourself to increase efficiency without needing new parts.
Cleaning or replacing your air filter: This is the most overlooked task. A dirty filter blocks airflow, forcing the unit to work harder to achieve the same cooling level — wasting electricity and wearing out the machine faster. Filters should be cleaned or replaced every one to three months. Replacement filters are sold at Walmart or Home Depot for 5 to 30 USD depending on the type.
Keeping the outdoor condenser unit clear: Make sure there are no plants, debris, or objects blocking the outdoor unit. The unit needs at least 60 centimeters of space around it for proper heat dissipation. You can gently spray water on the condenser to cool it — but turn off the system before doing this.
Setting an appropriate temperature: According to the U.S. Department of Energy, setting 78 degrees Fahrenheit (about 26 degrees Celsius) when at home and 85 to 88 degrees Fahrenheit when away is optimal for electricity savings. Each additional degree Fahrenheit on your cooling setting can save 6 to 8% of cooling costs according to the U.S. Environmental Protection Agency (EPA).
Using a smart thermostat: If you do not have one, this is an investment worth considering. Devices like Nest or Ecobee — priced from 130 to 250 USD — automatically adjust temperature based on your schedule, helping save an average of 10 to 15% on annual electricity bills according to Google Nest data.
A Special Note for Vietnamese Families in America
Many Vietnamese families living in hot regions like Houston, Dallas, Orange County, or the Inland Empire in California — places where summers are particularly harsh and electricity bills can easily reach 300 to 500 USD per month — should pay particular attention.
One important note: many nail salons, hair salons, and restaurants owned by Vietnamese people have living spaces adjacent to or above commercial space. These spaces often have low ceilings, poor insulation, and dense electrical equipment — resulting in room temperatures significantly higher than typical residential homes. In this case, small industrial fans (box fan or tower fan) combined with thermal curtains are the quickest and least expensive solution while waiting for HVAC repair.
Additionally, many states have energy assistance programs for low-income households. The LIHEAP (Low Income Home Energy Assistance Program) managed by the U.S. Department of Health and Human Services can help cover part of your summer electricity bill. Check eligibility and apply at benefits.gov or contact your local social services office.
When to Call a Technician Immediately
There are signs that your air conditioner needs immediate attention and cannot wait:
- The unit runs continuously but your home is still hot and your electricity bill spikes — the refrigerant may be leaking.
- There are unusual noises (squeaking, banging) coming from inside the unit.
- Water is flowing from the indoor coil abnormally — the drainage line may be clogged.
- Strange or chemical smells from the unit.
These situations should not be handled yourself. Call a technician and ask about parts availability timelines upfront so you can make backup plans.
Summary
Whether or not replacement parts are available, you still have many tools at your disposal to keep your home cool and control your summer electricity bill. Sealing gaps, blocking sunlight, using fans correctly, changing your cooking and daily habits — each small action adds up to make a noticeable difference. And when your air conditioner is working again, these habits will continue to pay dividends: a cooler home, lower electricity use, and money saved.