Common HVAC Issues and Solutions: A Step by Step Guide for Troubleshooting Your System

Common HVAC issues and solutions

Homeowners understand the significance of keeping their HVAC system operating at peak performance, with year-round comfort guaranteed by it. Unfortunately, however, problems do occasionally arise, and in this guide we’ll discuss some of the more prevalent HVAC issues as well as solutions.

Airflow Issues

Are some rooms of your home being heated or cooled less efficiently than others? This could be caused by airflow issues. These could include dirty air filters, blocked ducts, or an improper functioning blower motor; frequently replacing or cleaning filters may help resolve these problems; otherwise if the blower motor itself needs replacement.

Dirty Air Filters

Dirty air filters are among the most prevalent HVAC issues, limiting airflow through your HVAC system and leading to higher energy bills as well as potentially compromising its integrity over time. To avoid this situation, make sure that you change your filters at least every three months to stay ahead of the problem.

Leakage of Refrigerant

Refrigerant is an integral component of an effective HVAC cooling process, and any leakage will significantly decrease its ability to cool your home effectively. Leaks may occur due to various causes – including an underperforming compressor or damaged coil – but a professional HVAC technician can identify its source and repair it immediately.

Electrical Issues

Electrical problems can stop your HVAC system in its tracks. These issues could stem from anything from faulty thermostats or circuit breakers to loose wiring issues; if your system stops turning on altogether, check both for potential causes; otherwise consult a professional as soon as possible to assess any electrical problems.

Faulty Thermostat

If your HVAC system is misbehaving, the culprit could be your thermostat. An inaccurately set or failing one could cause it to turn on and off at inconvenient times or never turn on at all; replacement or adjustment can solve this issue.

Loose Wiring

Loose wiring is a common electrical issue that could stop your system from functioning as intended. Over time, vibration or movement could loosen its connection and result in loose wiring causing its installation to malfunction. If this appears to be your issue, shut off power to your system immediately and seek professional HVAC technician help immediately to resolve it.

Mechanical Issues

HVAC mechanical problems can create various issues, from strange noises and reduced heating and cooling capacity, to strange noises or diminished performance altogether. They could stem from any number of mechanical components like your blower motor or fan belt – each potentially responsible for their own set of complications.

Faulty Blower Motor

Your HVAC’s blower motor is responsible for moving air throughout your system and, should it become defective, may lead to reduced airflow or odd noises coming from it – in which case, its replacement should be prioritized.

Broken Fan Belt

If you hear a squealing noise coming from your system, it could be indicative of a broken fan belt. The fan belt controls how air moves throughout your home – if it breaks, your system won’t be able to distribute heated or cooled air efficiently and will need professional HVAC assistance to repair or replace the fan belt before heating or cooling is restored to your home. An HVAC technician is available to replace it quickly.

Failure to Maintain

One of the primary sources of HVAC system issues is neglectful maintenance. Failing to perform regular checks on your system could force it to work harder than necessary and increase energy bills as well as incur additional repairs costs.

Routine Maintenance Tasks

In order to keep your HVAC system in top shape, regularly scheduled maintenance tasks should be performed to keep it operating optimally.

Solutions to Common HVAC Issues

Common HVAC problems may be resolved quickly with simple solutions; other issues may need professional intervention. Here are a few potential remedies for the most frequently reported HVAC issues:

Clogged Air Filters

Clogged air filters are an increasingly prevalent problem that can significantly compromise the functionality of an HVAC system. Luckily, though, replacing your filter is usually the answer – inspect it every month and swap out when dirty to ensure better indoor air quality as well as higher efficiency performance for both yourself and your HVAC unit.

Thermostat Malfunctions

IF YOUR HVAC system isn’t turning on or off correctly or maintaining the desired temperature, it could be down to your thermostat. Check that everything is set properly, including fresh batteries. If that fails to resolve the issue, replacing it might be best.

Refrigerant Leaks

If your air conditioner isn’t cooling as expected, it could be because of a refrigerant leak. If this is suspected, contact an HVAC professional as self-repair can be extremely hazardous and cause irreparable harm to the system.

Dirty Coils

Dirty coils can force your system to work harder than necessary, leading to higher energy bills and reduced performance. To resolve this problem, schedule professional coil cleaning.

Blocked Condenser

If your outdoor unit isn’t functioning, it could be due to a blocked condenser. Make sure there are no obstructions around the unit before calling an HVAC specialist who will inspect and repair it – or contact one for yourself to resolve it immediately!

Preventative Maintenance to Avert Common Issues

Preventative HVAC maintenance can help mitigate many HVAC-related problems and keep your system functioning efficiently. Here are a few tasks that will keep your system operating at peak condition:

Regular Filter Replacement Options

Replacing your air filter regularly is one way to prevent clogs and improve indoor air quality.

Annual Professional Maintenance Contract.

Establishing an annual maintenance agreement with an HVAC technician can help identify potential issues early and keep your system functioning at peak performance.

Clearing Debris

Clearing away debris from both your outdoor unit and indoor vents can help alleviate airflow issues that could potentially arise, which in turn helps keep air flowing freely through them and alleviate other potential issues such as blockages.

Correct Thermostat Usage

By setting the temperature appropriately and making use of programmable settings, using your thermostat correctly can significantly enhance its effectiveness in terms of increasing efficiency of your HVAC system.

When to Contact a Professional

While some HVAC issues can be easily solved with simple solutions, others often need professional assistance. Here are some indicators that it might be time to call in an HVAC specialist:

Unusual Noises

Any unusual sounds coming from your system such as banging, rattling or squeaking indicate there may be an issue which needs professional intervention.

Increased Energy Bills

Are Your Utility Bills Jumping Unexpectedly Do your energy bills unexpectedly rise without explanation, perhaps as a sign that something may be amiss with your HVAC system? This could be an indicator that there’s something amiss that requires attention.

Poor Airflow

If your HVAC system is producing inadequate airflow, it may be worth consulting an HVAC professional for an inspection.

Iced Coil

When your unit is not running efficiently, and especially if it’s low on refrigerant, the coils on the outside unit can ice up. This is definitely a sign you need to call a professional, because an EPA certification is required to handle refrigerant. Turn the system off at least 3-4 hours before our Service Technician arrives to thaw the system and so he can diagnose the system properly.

Frequent Repairs

If your HVAC system requires frequent repairs, it could be wise to consider purchasing a replacement system to save money over time.

The Bottom Line

Regular HVAC maintenance is key to avoiding common problems and keeping your system operating efficiently. By following regular schedules of inspection and promptly addressing any issues as they arise, regular maintenance can save money on energy bills as well as prevent costly repairs in the future. If you’re experiencing HVAC difficulties don’t hesitate to seek professional help immediately. See below for contact options.


In continuous operation since 1962, our expertise goes beyond just the mechanicals of your HVAC system. We’re pretty handy when it comes to ductwork and system-wide maintenance as well. For top-notch service keeping your home’s heating and cooling system clean and your family breathing clean, filtered air, contact Dor-Mar today.

Our team offers a wide array of routine maintenance and emergency services for your heating and cooling system, allowing your family to breathe fresh, safe, clean air and be comfortable year-round. We also offer a number of add-ons to your HVAC equipment that can improve your home’s Indoor Air Quality (IAQ), such as electrostatic air filters, whole-house humidifiers, duct cleaning, Ultraviolet-C lighting systems, and more.

Schedule an appointment for HVAC system troubleshooting or maintenance with us today by using our online contact form, or call one of local offices listed below. We pride ourselves on our customer-focused service, and our reviews show it.

Dor-Mar…Your Climate Hero!

Picture of Steven Brewer<br/>HVAC Expert & Owner

Steven Brewer
HVAC Expert & Owner

I started in the HVAC business as a young man, with my father putting me in crawl spaces to run ductwork while on summer vacation from school; I began full time in our family HVAC business at the age of 19. I obtained my state commercial HVAC license at 25. I'm married with three kids, and I love boating, fishing and hunting.

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