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If your AC is blowing warm air during Ohio’s peak summer heat, it’s a clear sign that something is wrong. Logan Services is here to help diagnose the issue fast, whether you live in Dayton, Columbus, or Cincinnati, with free, same-day estimates and next-day installation when needed.
Common Reasons Your AC Is Blowing Warm Air
A cooling system that’s running but not cooling can be caused by several problems. Here are the most common culprits:
1. Low Refrigerant Levels or Leaks
Refrigerant is essential for absorbing heat from indoor air. If levels are low due to a leak, your system can’t cool properly. Signs of a refrigerant issue include:
- Warm air is blowing from vents
- Hissing sounds near the unit
- Ice buildup on refrigerant lines
Do not attempt to recharge or repair refrigerant lines yourself. This job requires EPA-certified technicians, like those at Logan Services.
2. Dirty or Clogged Air Filters
A clogged filter restricts airflow, which can overheat the system and lead to warm air. Change filters every 1–3 months, especially during high-use seasons.
3. Frozen or Dirty Evaporator Coil
When AC coils freeze due to restricted airflow or dirty filters, heat can’t transfer effectively. This causes warm air to circulate. A frozen coil may also result in:
- Poor airflow
- Ice on the indoor unit
- Unusual hissing or bubbling sounds
Routine filter changes and professional cleanings can prevent this.
4. Faulty Compressor
The compressor is the core of your AC system, pushing refrigerant through the cooling cycle. A damaged or failed compressor prevents proper cooling and often requires a full system inspection.
5. Malfunctioning Thermostat
If your thermostat isn’t reading the correct temperature or sending accurate signals to the system, the result can be warm air instead of cool. Always check battery levels and settings first.
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Preventive Maintenance Tips to Avoid Warm Air Issues
Preventive care can reduce system failures and extend the life of your AC unit. Here’s how to keep your cooling system in top shape:
Schedule Annual HVAC Tune-Ups
Book a yearly HVAC inspection to identify issues early. Logan Services offers seasonal tune-ups in Dayton, Columbus, and Cincinnati to prepare your system before the summer rush.
Seal Air Leaks in Windows and Doors
Gaps in doors and windows force your AC to work harder, leading to stress on components and higher energy bills. Use weatherstripping and caulk to seal leaks.
Insulate and Seal Ductwork
Poor duct insulation can lead to conditioned air loss before it reaches living spaces. Logan Services professionals can assess duct performance and recommend sealing or insulation improvements.
When to Call a Professional AC Technician
Some cooling problems require expert tools and knowledge. Contact Logan Services if you notice:
- Persistent warm or hot air from vents
- Unusual sounds like hissing or buzzing
- Leaking water or condensate around the unit
- System frequently cycling on and off
Attempting DIY repairs can lead to further damage and increased costs. Our local technicians provide accurate diagnostics, clear estimates, and fast, friendly service.
What to Expect During an AC Repair Visit
We’ll explain the findings, recommend solutions, and provide a quote, so you’re never left guessing.
Trust Logan Services to Restore Your Home Comfort
Since 1969, Logan Services has helped Ohio homeowners stay cool with fast, friendly service, affordable solutions, and next-day AC installation. Whether your system needs a simple fix or full replacement, your comfort is our priority.
Call (800) 564-2611 or schedule your free estimate online today.
AC Blowing Warm Air FAQs
Start by checking the thermostat and air filter. If those are fine, the issue may involve refrigerant, coils, or a failed component. A licensed technician should perform any in-depth diagnostics or repairs.
Possible reasons include a clogged filter, refrigerant leak, dirty coils, electrical issues, or blocked ducts. Call Logan Services for a full system inspection in Cincinnati, Columbus, or Dayton.
Replace your air filter every 1–3 months, depending on usage and home conditions. Homes with pets or allergy concerns may require more frequent changes.
Running the AC with a frozen coil can damage the system. Turn off the unit and let it thaw completely. Then contact Logan Services for an inspection.
If the thermostat has dead batteries or incorrect settings, it’s a simple fix. However, wiring or sensor issues should be addressed by a professional technician.
Check your thermostat settings, circuit breaker, and air filter. If the system still won’t start, it may involve electrical or internal component issues that require expert service.
