If your air conditioner seems to be running nonstop, your home won’t cool below 75 degrees, or your energy bill has suddenly skyrocketed, you’re not alone.
During extreme heat waves across Chicagoland, HVAC systems are pushed harder than at any other time of year. When temperatures climb into the 90s with high humidity, even healthy air conditioning systems have to work overtime to keep homes comfortable.
At Alltech HVAC, we’ve been helping homeowners throughout Chicago’s North Shore and Northwest suburbs stay cool for years. As a family-owned and operated HVAC company, we understand the unique challenges our climate presents and proudly back every service with the Alltech Guarantee.
Whether your AC needs a simple repair, preventative maintenance, or it’s time for a replacement, knowing what your system should—and shouldn’t—do during a heat wave can save you money and prevent costly breakdowns.
Is It Normal for Your AC to Run All Day?
One of the most common questions we receive every July is:
“My AC never shuts off. Is something wrong?”
The answer depends on the weather.
During an extreme heat wave, it is perfectly normal for a properly functioning air conditioner to run for long periods.
However, your system should still be able to:
- Maintain your thermostat setting
- Remove humidity
- Produce consistent cool airflow
- Keep indoor temperatures comfortable
- Cycle off periodically during cooler evenings
If your home continues getting warmer throughout the day, it’s time to have your system inspected.
Five Signs Your Air Conditioner Needs Immediate Attention
1. Warm Air Coming From Vents
If the air feels room temperature or warm, you could have:
- Low refrigerant
- Dirty evaporator coils
- Compressor issues
- Thermostat problems
2. Your Home Won’t Cool Below 78°
A properly sized HVAC system should keep your home comfortable even during the hottest days.
If it can’t:
- Dirty condenser coils
- Restricted airflow
- Aging equipment
- Low refrigerant
may be reducing performance.
3. Rising Electric Bills
An inefficient AC works much harder than necessary.
Regular maintenance keeps systems operating efficiently and helps lower utility costs.
4. Ice On Refrigerant Lines
Ice almost always indicates an airflow or refrigerant problem.
Turn the system off and call a professional before damage becomes worse.
5. Strange Sounds
- Grinding
- Buzzing
- Clicking
- Squealing
- Rattling
None of these sounds are normal.
How to Help Your AC During a Heat Wave
Homeowners can dramatically improve cooling performance by:
- Changing the air filter every 30–90 days
- Keeping outdoor condensers free of weeds and debris
- Closing blinds during the afternoon
- Using ceiling fans
- Keeping doors and windows closed
- Avoiding unnecessary oven use
- Scheduling annual maintenance in the spring
Small improvements reduce strain on your HVAC system and improve energy efficiency.
Don’t Ignore Indoor Humidity
Humidity is just as important as temperature.
If your home feels sticky even though the thermostat says 72°, your system may not be removing moisture effectively.
Proper humidity control:
- Makes your home feel cooler
- Reduces mold growth
- Improves indoor air quality
- Protects hardwood floors
- Improves comfort
Alltech HVAC offers whole-home humidity solutions to keep your home comfortable all summer.
Is It Time to Replace Your Air Conditioner?
Many homeowners ask:
“When should I replace my AC?”
Signs it may be time include:
- System over 12–15 years old
- Frequent repairs
- High energy bills
- Uneven cooling
- Loud operation
- Uses R-22 refrigerant
- Major compressor failure
Modern high-efficiency systems cool better while using significantly less electricity.
Proudly Serving Chicagoland’s Northwest & North Shore Communities
Alltech HVAC proudly serves homeowners throughout:
- Des Plaines
- Park Ridge
- Glenview
- Northbrook
- Arlington Heights
- Mount Prospect
- Prospect Heights
- Buffalo Grove
- Lincolnshire
- Long Grove
- Deerfield
- Wilmette
- Winnetka
- Glencoe
- Barrington
- South Barrington
- Palatine
- Schaumburg
- Hoffman Estates
- Elk Grove Village
- Morton Grove
- Niles
- Rolling Meadows
- Northfield
- Highland Park
- Lake Forest
- Inverness
- Bannockburn
- Riverwoods
- Kenilworth
- 60625
- 60630
- 60631
- 60634
- 60635
- 60641
- 60646
- 60648
- 60656
- 60659
Why Homeowners Choose Alltech HVAC
We’re proud to be a family-owned and operated HVAC company built on honest recommendations, reliable workmanship, and exceptional customer service.
Every repair, maintenance visit, and installation is backed by the Alltech Guarantee, giving homeowners confidence that the job will be done right.
Schedule Service Before Your AC Breaks Down
Don’t wait until your system quits during the hottest week of the summer.
Whether you need:
- Emergency AC repair
- Preventative maintenance
- Indoor air quality solutions
- Air conditioner replacement
- Thermostat upgrades
- Whole-home comfort solutions
Alltech HVAC is here to help. Stay cool this summer with the Alltech Guarantee – Service. Repair. Replace. Maintain. That’s it!