We put together a few simple tests that might help you pinpoint the problem with your HVAC. You might even be able to fix some of them yourself! These quick checks are easy to do and can save you both time and frustration.
1. Check Your Air Filter
Why it matters: A dirty air filter is the most common preventable cause of HVAC issues. It restricts airflow, which can lead to overheating, frozen coils, or reduced efficiency.
How to test it: Remove the filter and hold it up to a light. If you can’t see through it, it’s time to replace it. Most filters should be changed every 1–3 months, depending on usage and filter type.
2. Perform the Dollar Bill Test
Why it matters: This test checks whether your outdoor condenser coil is pulling enough air through the system.
How to test it: Take a dollar bill and hold it against the side of your outdoor AC unit while it’s running. If the dollar stays stuck to the unit, the airflow is strong. If it falls off, the coil may be dirty or clogged.
3. Inspect the Drain Line
Why it matters: A clogged condensate drain line can cause water to back up into your system, leading to water damage or mold.
How to test it: Locate the drain line (usually near the indoor unit) and check for visible clogs. If it’s accessible, use a wet/dry vacuum to clear the line. Make sure water is flowing freely when the AC is running.
4. Check the Thermostat Settings
Why it matters: Sometimes, HVAC issues are as simple as incorrect thermostat settings.
How to test it: Ensure your thermostat is set to the correct mode (heat or cool) and temperature. Double-check that the fan is set to “auto” rather than “on” for better efficiency. If your system still isn’t responding, replace the thermostat batteries and try again.
5. Look for Water in the Drain Pan
Why it matters: The drain pan under your indoor unit catches excess condensation. If it’s full, it might mean the drain line is clogged or the system isn’t draining properly.
How to test it: Shine a flashlight into the pan. If you see standing water, clear the drain line or call a professional to check for deeper issues.
When to Call a Professional
While these simple tests can help you troubleshoot common HVAC issues, some problems require specialized tools and expertise. If your system still isn’t working properly, give us a call (or text) at (864) 808-0050 and we'd love to help.
