Troubleshooting Common HVAC Issues: A Homeowner's Guide Nov 14, 2025

As a homeowner, dealing with unexpected HVAC issues can be both frustrating and inconvenient. Yet, many common HVAC problems can be addressed with some basic troubleshooting before calling a professional. At 17 Degrees A/C and Heating, we understand the importance of keeping your home comfortable year-round, so we've compiled a handy guide to help you handle common HVAC issues confidently and effectively.

When it comes to HVAC systems, one of the most frequent issues homeowners encounter is insufficient cooling or heating. If you notice that the air conditioner isn't cooling the house or the heater isn't warming it effectively, start by checking your thermostat settings. Ensure that it is set to the correct mode (heating or cooling) and at the desired temperature. It's also worth verifying that the thermostat is functioning properly, as dead batteries or a tripped circuit breaker could be the culprits.

Another common issue is restricted airflow, which can significantly impact your HVAC system's efficiency. Begin by inspecting your system's air filters. Dirty or clogged filters can restrict airflow, causing your system to work harder than it should. Regularly replacing or cleaning your air filters, typically every one to three months, can help maintain optimal airflow and system performance. Additionally, check all vents and registers to ensure they are open and unobstructed.

Strange noises emanating from your HVAC system can be alarming. If you hear rattling, buzzing, or squealing sounds, it may indicate loose components, debris in the blower, or a worn-out belt. While some noise issues can be minor, others may require the attention of a professional technician. It’s best to address unusual sounds promptly to prevent further damage.

Frequent cycling, where an HVAC unit turns on and off more often than necessary, can often be traced back to a few possible causes. One common reason is an oversized system, but if your unit has been working fine previously, inspect the condition of your thermostat as well as the air filter. These quick checks might uncover the root of the cycling issue. However, if these do not resolve the problem, you could be facing a more serious issue like a malfunctioning component or electrical issue.

Some homeowners also encounter issues with uneven temperatures throughout the house. Poor insulation, blocked vents, or leaky ductwork can all contribute to inconsistent temperature distribution. If you suspect faulty ductwork, a professional inspection from companies like 17 Degrees A/C and Heating can ensure your ducts are properly sealed and insulated, thereby enhancing overall efficiency.

In cases where a musty or unusual odor fills your home as the HVAC operates, immediately check for potential water leaks or mold growth within the system. Condensation drain clogs can lead to water buildup and consequent mold proliferation, which not only affects air quality but also poses health risks. Ensuring regular maintenance and cleaning of drains is vital to prevent such occurrences.

In conclusion, while some HVAC issues can be resolved with straightforward troubleshooting, others may require professional expertise. Regular maintenance by seasoned professionals like those at 17 Degrees A/C and Heating can help prevent many common problems before they start. By scheduling routine check-ups and being proactive about system care, you can enjoy a comfortable, efficiently running HVAC system year-round, giving you peace of mind no matter the season.