There’s no worse time for your air conditioner to stop working than during a blazing summer heat wave. When the heat index climbs into the 90s and your home should feel like a sanctuary, a sudden AC failure is stressful — and for vulnerable family members, genuinely serious.
At Lawrence Air Systems, we know that when your family’s comfort is at stake, every minute counts. This guide walks you through what to check yourself, what to tell the technician, and how to stay safe while you wait.
Step One: Check the Simple Things First
Before assuming the worst, a significant number of “AC failure” calls trace back to something straightforward. Spend five minutes here before picking up the phone.
Check the thermostat. Make sure it’s set to COOL and the temperature is set lower than the current room temperature. If the screen is blank or dim, the batteries may need replacing — this is more common than it sounds, and we’ve seen fully dead thermostats restored with fresh batteries even when the low-battery indicator wasn’t showing.
If you have a smart thermostat, check the app for any error codes or connectivity issues. Some models will also allow a factory reset that clears software-related lockouts.
Check the circuit breaker. Go to your breaker panel and look for any tripped breakers. A tripped breaker doesn’t always move fully to the OFF position — it often sits in a middle position that looks almost-on. Reset any suspect breakers by first pushing them fully to OFF and then back to ON.
Check the air filter. A severely clogged filter can restrict airflow enough to trigger a safety shutdown. Pull the filter and inspect it. If it looks gray, clogged, or it’s been more than 60–90 days since the last change, replace it and give the system a few minutes to recover before testing again.
Step Two: A Few More Things Before Calling
If the thermostat, breaker, and filter are all clear and the system still isn’t performing, check these before calling:
Look for ice on the system. Check the indoor unit and the refrigerant lines. Frost or ice buildup on the lines or indoor coil points to a refrigerant issue or an airflow problem that was developing before the failure. If you find ice: turn the system off (switch to fan-only if the thermostat allows) and let it defrost for two to three hours. Don’t run the system with ice on the coils — continued operation risks compressor damage.
Listen to what the system is doing. If the system is making sounds it shouldn’t — grinding, banging, squealing, or persistent clicking — shut it down. These sounds indicate a mechanical problem that continued operation will worsen.
Check the outdoor unit. Make sure the outdoor condenser isn’t blocked by leaves, branches, or debris. A blocked unit can overheat and shut down on the high-pressure safety cutout. Clear any obvious debris, and if the unit looks dirty, you can gently rinse the exterior fins with a garden hose (never a pressure washer). Confirm the fan is spinning freely when the unit tries to run.
Step Three: When to Call for Professional Service
Call Lawrence Air Systems if:
- The system doesn’t turn on at all despite the above checks
- It’s running but blowing warm or room-temperature air
- It keeps turning on and off (short cycling)
- You see water leaking from the indoor unit or around the air handler
- There are unusual smells from the vents — a burning smell is an electrical concern; a musty odor may indicate a microbial issue on the coils or in ductwork
- You hear loud or alarming sounds: squealing, hissing, or metallic grinding
- The refrigerant lines are frozen or you suspect a refrigerant leak
Mid-Season Insight: Why August Failures Happen
Most summer AC failures don’t come from nowhere. They come from developing problems — a borderline capacitor, a coil that was partially fouled going into the season, a refrigerant charge that was slightly off — that finally give out under the sustained demand of a heat wave.
This is why homeowners across East Bay, Aquidneck Island, Jamestown, and out to Westport rely on the experienced team at Lawrence Air Systems for spring Total System Cleanings — catching those borderline components in May when scheduling is flexible, not in August when every HVAC company in the region is fully booked.
Annual Maintenance Program (AMP) members receive priority scheduling during exactly these high-demand periods.
While You Wait: Staying Safe and Comfortable
Waiting for a technician during a heat wave is uncomfortable but manageable with a few practical steps.
Block solar heat gain. Close blinds and curtains on south and west-facing windows. This is the single most effective passive cooling step available — direct sun through glass significantly heats indoor spaces. Blackout curtains make a meaningful difference.
Use fans strategically. Set ceiling fans to run counterclockwise (summer mode) to push cooler air downward. On cooler nights, open windows and use box fans to pull outdoor air in — but only when outdoor temperatures have actually dropped below indoor temperatures.
Move to lower levels. Heat rises. The lowest level of your home — particularly a finished basement — will be noticeably cooler than upper floors during a heat wave. Relocate sleeping arrangements temporarily if upper-floor temperatures become uncomfortable.
Avoid adding indoor heat. Skip the oven and stove. Limit electronics and lighting in enclosed rooms. Unoccupied rooms with lights and electronics generate meaningful heat loads.
Stay hydrated. In a heat wave without AC, maintain water intake regardless of thirst. Avoid caffeine and alcohol, which accelerate dehydration. Cool showers and damp cloths on pulse points (wrists, neck) provide quick relief.
Know when to seek cooling resources. Rhode Island and Massachusetts municipalities open cooling centers during heat emergencies for vulnerable populations. If a household member — particularly elderly, young children, or those with health conditions — is struggling significantly, don’t wait for the repair: use a library, mall, or cooling center until the system is restored.
The Best Fix: Preventing It From Happening Again
A mid-summer AC failure is stressful and avoidable. Routine maintenance is the most reliable prevention.
A spring Total System Cleaning with Lawrence Air Systems includes: cleaning indoor and outdoor coils, testing electrical components including capacitors and contactors, verifying refrigerant charge, clearing the condensate drain, replacing the filter, and testing full system performance. This is when borderline components get caught — before they fail during peak demand.
If your cooling system is 12–15 years old or older, a repair-versus-replacement conversation is worth having before the next heat wave. Modern systems are quieter, more efficient, and more reliable — and a planned replacement in spring happens on your timeline rather than in emergency mode in August.
Frequently Asked Questions
My AC is running but the house isn’t cooling. What’s happening? Several possibilities: a dirty filter restricting airflow; low refrigerant charge from a slow leak; a partially blocked condenser coil reducing heat rejection; or a failing compressor. Of these, a dirty filter is something you can check and fix immediately. The others require professional evaluation.
How long does a service call typically take? A diagnostic visit for most common AC failures takes one to two hours. If a part is needed — a capacitor, contactor, or motor — same-day repair is often possible if the part is in stock. For less common components, next-day service is typical.
Is it worth repairing an AC that’s over 12 years old? It depends on the repair. A capacitor replacement on a 14-year-old system that’s otherwise in good condition may be worth doing. A compressor replacement on a 15-year-old system with a history of repairs is a different conversation. Lawrence Air Systems provides written comparisons of repair vs. replacement economics so you can make an informed decision.
An AC breakdown in the middle of a heat wave is stressful — but you don’t have to face it unprepared. The experienced team at Lawrence Air Systems serves homeowners across East Bay, Aquidneck Island, Jamestown, and out to Westport with fast, reliable emergency service.
Call (401) 213-1516 for emergency AC service. AMP members receive priority scheduling — the benefit you want most on the hottest day of the year.