HVAC Troubleshooting: 5 Common Issues and How to Address Them Yourself

Whether it's a hot summer day or the middle of winter, we all rely on our HVAC systems to keep our homes comfortable. But when something goes wrong, it can easily become frustrating. The good news? Some common HVAC issues are easier to troubleshoot than you might think! Here are five HVAC problems you might run into and how you can fix them before needing to call in the pros for assistance at Mile High Plumbing, Electric and Air.

1. Your HVAC System Won’t Turn On

This is one of those “Oh no” moments, but don't panic just yet! If your HVAC system refuses to kick on, it could be something simple like a power issue. Here’s what to check:

- Thermostat Settings: Make sure your thermostat is set to the correct mode (heating or cooling) and that it’s set to a temperature that will trigger the system to turn on.

- Circuit Breaker: Sometimes, a tripped breaker can cut power to your HVAC unit. Check your electrical panel to see if the breaker needs to be reset.

If everything appears to be in working condition but your system still won’t turn on, this could be an indication that it might be time to call in a professional.

2. Weak Airflow

If your HVAC system is running, but you’re barely feeling any air coming through the vents, weak airflow is usually the problem. Here’s what you can do:

- Change the Air Filter: One of the most common culprits for poor airflow is a dirty or clogged air filter. Replace it if it’s been a while since your last change. For preventative maintenance, change your filter every three months.

- Check Vents and Registers: Make sure the vents around your home aren’t blocked by furniture, curtains, or other items that could prevent air from circulating properly.

If neither of those helps, it could be a sign of a more serious issue with your system’s blower or ductwork, and it’s probably time for an HVAC tech to take a look.

3. Uneven Heating or Cooling

Ever notice that one room is freezing while another feels like a sauna? Uneven temperatures can be super annoying, but they’re often fixable:

- Adjust Your Dampers: Dampers look like small doors inside your ductwork that control how much air flows to each room. Adjusting them can help balance the temperature throughout your house.

- Check for Drafts: If certain rooms feel hotter or colder, check for drafty windows or doors that might be letting outside air in.

If those don’t solve the problem, it might mean your system isn’t sized correctly for your home, and that’s something a pro will need to help with.

4. The System is Constantly Running

If your HVAC system is running non-stop, that’s a sign something isn’t quite right. Here’s what you can try:

- Check the Thermostat: Make sure it’s not set to "fan" mode, which keeps the fan running even when your system isn't actively heating or cooling. Switch it to "auto" so the fan only runs when necessary.

- Inspect the Air Filter: A dirty air filter can make your system work harder than it needs to. If it’s clogged with debris, replace it.

If your system keeps running after you’ve checked these things, there might be a bigger problem with your thermostat or your HVAC system itself.

5. Unusual Noises

HVAC systems are supposed to hum quietly in the background, so if you’re hearing strange noises like banging, rattling, or squealing, it’s a red flag:

- Loose Parts: Screws and bolts can come loose over time, which might cause banging or rattling noises. Turn off your system and see if tightening things up helps.

- Worn Belts or Bearings: If you’re hearing squealing, it could be an issue with the blower motor. This one’s a little more technical, so it’s probably best to call a pro if tightening things doesn’t fix the noise.

When to Call in the Experts

While some HVAC issues are easy to troubleshoot and fix on your own, others require the assistance of a seasoned professional. If you’re unsure about anything or if these tips don’t solve the problem, don’t hesitate to contact our team at Mile High Plumbing, Electric and Air. We’re here to get your system back on track and keep your home or business comfy year-round!

Need HVAC Help? 

Reach out to our team at 303.859.0100 or visit our request page to schedule an inspection or repair service. We're always here to help!