For many homeowners in the Charleston area, a multi-zone AC system is essential to maintaining a comfortable environment year-round. But sometimes even well-maintained systems stop working properly.

A common issue many homeowners face is the downstairs AC not working while the upstairs AC hums perfectly. At Preferred Home Systems, we understand this issue can be puzzling and, given the Southern heat, irritating and inconvenient. Let’s explore why this might happen and what you can do about it.

5 Possible Reasons

Like many mechanical systems, your AC is a complex combination of parts. Even small problems in an area can cause your downstairs AC to stop working while your upstairs AC works.

Here are some common reasons for the discrepancy:

  1. Thermostat issues: Your downstairs might be suffering from thermostat-related issues. Thermostats control the temperature of each zone in your home, and if one malfunctions, it might not signal the AC unit to start cooling a particular area.
  2. Airflow restrictions: A clear path for air is crucial for efficient cooling. Clogged filters or blocked vents can restrict airflow, causing inconsistencies in cooling.
  3. Electrical issues: If there’s a problem with the electrical circuits dedicated to the downstairs unit, it won’t turn on or function properly.
  4. Refrigerant leaks: Your AC requires refrigerant to cool the air. A leak in the downstairs unit might lower its ability to cool while the upstairs remains unaffected.
  5. Ductwork problems: Leaks or blockages in the ductwork can prevent cool air from reaching the downstairs areas.

DIY Troubleshooting Tips

Before diving into complex troubleshooting or calling in the professionals, there are some straightforward checks every homeowner can perform to pinpoint issues with their AC system. These steps not only help you understand the root of the problem but can sometimes offer a quick fix. From inspecting the thermostat to being vigilant for any peculiar sounds, here’s a guide to some primary checks.

  • Check the thermostat: Ensure it’s set to the correct mode and temperature. Sometimes, a simple reset can get it working again.
  • Inspect air filters: Dirty or clogged air filters can reduce airflow and efficiency. If they look dirty, either clean or replace them.
  • Examine circuit breakers: Head over to your electrical panel and ensure the breaker for the downstairs unit hasn’t tripped. If it has, reset it.
  • Check air vents: Walk around your downstairs area and ensure all vents are open and free from obstructions.
  • Listen for unusual noises: Odd sounds can indicate a problem with components like the compressor or fan. If you hear any, make a note of it.

When To Seek Professional Help

While the above DIY tips can be handy, it’s important to recognize that only some AC problems can be fixed with professional expertise. If you’ve tried the above steps and still need help with issues or are unsure about a particular problem, it’s time to bring in the experts.

When you work with skilled professionals for your AC repairs, you ensure the longevity of your system, maintain the comfort of your home, and save money in the long run by avoiding more significant repairs.

Choose Preferred Home Services for Your AC Repairs

Ensuring a cool and comfortable environment in every part of your home is crucial, especially during those sizzling Southern summers. While DIY troubleshooting can sometimes fix minor issues, remember that some problems need skilled professionals. If you find your downstairs AC struggling, don’t sweat it.

With a deep commitment to providing superior quality plumbing and HVAC service, our mission at Preferred Home Service has always been to serve with honesty, professionalism, and dedication. Your convenience is our priority, and our team embodies the spirit of true team players — always ready, always accountable, and always aiming for excellence.

Have a downstairs AC system that isn’t working correctly? Call Preferred Home Services at (843) 405-3601 to schedule your AC repair service today.