It’s a scorching summer afternoon, and you’re ready to cool off after a long day. You start your car, crank the A/C—and instead of the refreshing blast you expected, you’re hit with hot air. Frustrating? Absolutely. But don’t worry—there are a few common reasons your vehicle’s air conditioning might stop cooling properly.
From refrigerant leaks to electrical failures, here’s what could be going on under the hood—and how a professional technician can help.
- Low or Leaking Refrigerant
Refrigerant is an essential component of your A/C system. If there’s a leak, the system can’t build the pressure needed to circulate and cool the air. Over time, seals or hoses may wear down and allow refrigerant to escape, especially in older vehicles or during periods of non-use.
Warning signs:
- A/C air starts cool but gets warmer
- Hissing sounds under the hood
- Visible oily residue near A/C lines
The fix: Your system will need to be inspected, repaired, and recharged with refrigerant to restore proper cooling.
- Faulty A/C Compressor
The compressor is what keeps the refrigerant flowing through your system. If it fails, the entire A/C system can’t function properly. Common causes of compressor failure include age, infrequent use, or internal damage.
Pro tip: Run your A/C for 10–15 minutes at least once a month—even in the winter—to keep the compressor lubricated and in working condition.
- Electrical or Sensor Malfunctions
Modern A/C systems rely on an intricate network of wires, sensors, and fuses. If a single sensor or fuse fails, it can shut down the entire system as a safety measure. These issues are harder to spot without diagnostic tools.
Warning signs:
- A/C fan not turning on
- Dashboard error codes
- Sudden loss of A/C function
The fix: Electrical issues require a technician to run a full diagnostic to pinpoint the problem and repair or replace the faulty component.
- Other Potential Causes
While leaks, compressors, and electrical faults are the most common, other culprits include:
- Clogged cabin air filter
- Broken cooling fans
- Malfunctioning blend doors
- Issues with the A/C control module
Stay Cool—Schedule an A/C Diagnostic Today
Don’t sweat it. If your car’s A/C isn’t working as it should, the best step is to take it to a trusted technician. At Glover Tire Service, we’ll inspect your system, pinpoint the issue, and get you back to comfortable driving in no time. Schedule an appointment today and stay cool all summer long.
