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DIY HVAC Troubleshooting Guide
Simple Steps Before You Call the Pros
Is your air conditioner or heating system acting up? Before scheduling a service call, click on your issue below and try these easy troubleshooting steps to see if you can identify the issue yourself. If these tips don’t help you identify the issue, our expert technicians are ready to help!
✔ Check the Thermostat – Make sure it’s set to “Cool” and the temperature is set lower than the current room temperature.
✔ Inspect the Air Filter – A dirty filter can restrict airflow. Replace it if it’s clogged.
✔ Check Your Vents – Ensure all supply and return vents are open and unobstructed.
✔ Look at the Outdoor Unit – Clear away leaves, debris, or anything blocking airflow around the condenser.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Check the Power – Ensure the system is plugged in, and check the circuit breaker for tripped switches.
✔ Inspect the Thermostat – Dead batteries or incorrect settings can prevent it from turning on.
✔ Check the Drain Line – A clogged drain safety switch may shut down your system.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Check the Drain Line – A clogged condensate drain can cause leaks. Try clearing it with a wet/dry vacuum.
✔ Inspect the Air Filter – A dirty filter can lead to frozen coils, which may cause water buildup.
✔ Look for Ice on the Coils – If the coils are frozen, turn off the system and let them thaw before restarting.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Rattling or Banging? – This could indicate loose parts or debris in the system.
✔ Whistling or Hissing? – Possible duct leaks or refrigerant issues.
✔ Squealing? – A worn-out belt or motor bearings may need replacement.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Check the Drain Line – A clogged condensate drain can cause leaks. Try clearing it with a wet/dry vacuum.
✔ Inspect the Air Filter – A dirty filter can lead to frozen coils, which may cause water buildup.
✔ Look for Ice on the Coils – If the coils are frozen, turn off the system and let them thaw before restarting.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Check the Air Filter – A dirty filter can block airflow, causing coils to freeze. Replace it if dirty.
✔ Look for Blocked Vents – Make sure vents are open and unblocked to allow proper airflow.
✔ Inspect the Thermostat – Running your AC at very low temperatures for long periods can cause freeze-ups. Try raising the temperature a few degrees.
✔ Turn Off the System – If you see ice on the coils, turn off your AC and let it thaw completely before restarting.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
✔ Check the Batteries – If your thermostat uses batteries, replace them and see if it powers back on.
✔ Check the Circuit Breaker – A tripped breaker can cause your thermostat to lose power. Reset it if needed.
✔ Inspect the Furnace or Air Handler – If the unit has lost power, the thermostat may go blank. Ensure the HVAC system switch is on.
✔ Look for a Tripped Safety Switch – Some systems shut off if there’s a clogged drain or another safety issue. Check for standing water near your unit.
👉 Still no display? You may have a wiring issue or a faulty thermostat— Click HERE a and give us a call!
When to Call the Experts
If you’ve tried these troubleshooting steps and your HVAC system still isn’t working properly, it’s time to call in the professionals. Our certified technicians can quickly diagnose and fix any issue, ensuring your home stays comfortable year-round.
Disclaimer
The troubleshooting tips provided on this page are for informational purposes only and are intended to help homeowners with basic HVAC issues. While some minor problems can be resolved with simple checks, HVAC systems contain electrical components, refrigerants, and mechanical parts that can be dangerous if handled improperly.
By using this guide, you acknowledge that Florida Comfort Air Conditioning is not responsible for any damage, injury, or further issues that may arise from attempting DIY troubleshooting. For complex problems, safety concerns, or system malfunctions, we strongly recommend contacting our licensed HVAC professionals for expert diagnosis and service.