Common HVAC Problems and How to Troubleshoot Them


Routine professional HVAC service is crucial to your system’s performance. That said, some everyday issues have simple, do-it-yourself solutions. Knowing how to troubleshoot common problems and when to call in the experts, like Chancey & Reynolds, is key to keeping your system running smoothly while saving you time and money.

In this blog, we explore the most common HVAC problems and provide DIY troubleshooting tips to help you keep your system running smoothly between scheduled maintenance. Let’s dive in

Woman wiping brow due to broken HVAC unit

Uneven Cooling or Heating

What’s the issue?

Uneven distribution of temperature in your space can be frustrating, with certain rooms feeling uncomfortably warm while others may feel too cold.

Troubleshooting Tips:

  • Change your air filter: A dirty or clogged filter restricts airflow and can cause uneven temperatures. Replace your air filter regularly, typically every one to three months.
  • Inspect vents and registers: Blocked vents can easily disrupt air circulation and temperature distribution, so make sure all your vents and registers are open and unobstructed.
  • Calibrate your thermostat: Make sure your thermostat is calibrating temperature accurately. Different thermostats require different calibration techniques, so consult your manual first. Also, ensure your thermostat is not placed near drafts or sources of heat.
  • Check your ductwork: Consider calling an HVAC specialist to inspect your ductwork for any leaks or obstructions.

Unusual Noises

What’s the issue?

If you hear unusual noises like banging, rattling, or squealing from your HVAC system, it could indicate an underlying issue that you (or a professional) must address.

Troubleshooting Tips:

  • Identify the noise: Try to figure out the type, location, and source of the noise. Different sounds can indicate various issues.
  • Tighten loose hardware: Inspect your system for loose screws, bolts, or belts. Tighten them if you can.
  • Make sure moving parts are lubricated: HVAC parts like the blower motor and the fan move almost constantly, requiring lubrication to reduce friction.
  • Call a professional: As always, if there is no quick, simple solution, and you notice the strange sounds persist, call a professional. They can diagnose and address the issue.

Thermostat Problems

What’s the issue?

You might encounter various types of thermostat malfunctions, and addressing them may range from simple DIY fixes to seeking assistance from a professional.

Troubleshooting Tips:

  • Check the thermostat settings: Make sure your thermostat is set to the desired temperature and the correct mode (heating or cooling) for that temperature setting.
  • Replace the batteries: If your thermostat uses batteries, replace them if they’re low. A dead battery can cause issues.
  • Clean your thermostat: Dust and dirt can affect thermostat performance. Gently clean buttons and sensors.
  • Consider upgrading: If your thermostat is over ten years old, consider upgrading to a programmable thermostat (or smart thermostat) for better control and energy savings.

DIY vs. Professional Assistance

As a homeowner or business owner, it’s possible to troubleshoot common HVAC problems yourself. However, it’s important to recognize when you need professional assistance. Heating and cooling equipment can be complex and hazardous, and attempting DIY repairs without sufficient knowledge can result in additional problems and safety concerns. If the issues persist after troubleshooting, contact a trusted professional HVAC technician like the ones at Chancey & Reynolds.

Preventive Maintenance

If you want your HVAC system to function well and last for a long time, it’s essential to prioritize preventative maintenance. Here are a few steps you can take:

Trust the HVAC Experts in Knoxville and Lenoir City

Maintaining a comfortable indoor environment can be achieved by understanding and being able to troubleshoot common HVAC problems. These troubleshooting tips will help you save time and money between routine maintenance services.

When it comes to keeping your HVAC system running smoothly and ensuring year-round comfort, Chancey & Reynolds is the go-to choice for professional repairs, maintenance, service, and installations. Residents across Knoxville and Lenoir City trust our expertise in heating and cooling.

With decades of experience and a reputation for excellence, we’re the trusted residential and commercial HVAC solutions provider. Our NATE-certified technicians are committed to delivering top-of-the-line solutions tailored to your unique requirements. Plus, we offer free estimates and financing options for those who qualify to make the process as hassle-free as possible. Call us today!

Knoxville Office: (865) 525-5076 • Lenoir City Office: (865) 986-3883