Summer heat is no joke—especially when your air conditioner starts showing signs of strain. By the time August rolls around, your AC system has been working overtime for months. And while a well-maintained unit can handle the stress, an aging or neglected system might be close to calling it quits.
At our HVAC company, we’ve seen far too many homeowners caught off guard by AC breakdowns during the hottest weeks of the year. The good news? Your system often gives warning signs before it fails. Knowing what to watch for can save you from the discomfort (and cost) of an emergency repair or replacement. Here are five clear signs your AC may not make it through the rest of summer—and what you should do about it.
1. Weak or Inconsistent Airflow
If some rooms in your home are cool while others feel warm and stuffy, your system could be struggling to push air effectively. Poor airflow is often a sign of:
- A failing blower motor
- Dirty coils or filters
- Leaky or blocked ductwork
When airflow is compromised, your AC works harder to maintain your set temperature—putting extra strain on the system and shortening its lifespan.
Pro tip: Check your filters first, but if airflow doesn’t improve, it’s time to schedule a professional inspection.
2. Unusual Noises During Operation
Air conditioners should hum quietly in the background—not rattle, grind, or squeal. Any new or worsening noise is a red flag, especially if it sounds like:
- Banging or clanking (loose parts or motor issues)
- Screeching (worn-out belts or bearings)
- Buzzing (electrical problems or debris in the unit)
Ignoring these sounds can lead to complete system failure or costly damage to internal components.
3. Warm Air Coming from Vents
If your AC is running but blowing warm or room-temperature air, it’s not doing its job. This can point to:
- Low refrigerant levels
- A failing compressor
- A malfunctioning thermostat
- Blocked or dirty condenser coils
Refrigerant leaks and compressor issues often indicate the system is nearing the end of its useful life—especially if the unit is 10 to 15 years old.
4. Frequent Cycling or Long Run Times
Is your AC turning on and off repeatedly or running almost nonstop to keep your home cool? Both behaviors signal that the system is struggling to maintain performance. This could be caused by:
- An undersized or oversized system
- Failing components
- Dirty coils or clogged filters
- Poor insulation or thermostat placement
Excessive cycling wears down your system quickly and leads to higher energy bills—and often, a mid-season breakdown.
5. Spikes in Your Energy Bill Without Explanation
A sudden jump in your utility bill (without a change in thermostat settings or heatwaves) usually means your AC is running inefficiently. Aging systems lose performance gradually, and as components wear out, energy usage rises.
If your energy costs are rising month after month, your AC may be working twice as hard to cool your home—and that’s not sustainable for long.
Shafer Heating & Cooling, LLC: You are just one call away from the comfort and savings you deserve! Schedule an appointment today for AC services.