Common problems with HVAC Systems

HVAC systems are complex and contain a wide variety of components that are liable to wear and tear, and ultimately failure, particularly if the system is poorly maintained.

Problems can and do occur with HVAC systems, often developing over time and making them difficult to identify at an early stage. When common HVAC problems finally become apparent, they may require more extensive maintenance than if they’d been spotted early on. Even if a problem doesn’t lead to system failure, it can result in your system working less efficiently and becoming more costly to run.

Here we take a look at some of the most common HVAC problems and how to address them.

What are the most common problems with HVAC systems?

HVAC systems can experience problems that impact their performance and efficiency. From dirty filters and thermostat issues to refrigerant leaks and fan problems, there is a range of common issues that can arise in HVAC systems. These include:

Dirty or Clogged Filters

Over time, HVAC filters can become dirty or clogged. This restricts the free flow of air through the system and reduces the efficiency of your HVAC system. Filters should be checked regularly and replaced when necessary to ensure optimal performance.

Thermostat

Problems with the thermostat can develop. If your HVAC system isn’t responding to changes in the thermostat, it may suggest there’s a problem. This can be as simple as faulty wiring, or it may be a problem in the thermostat itself which ultimately may require replacing.

Electrical Problems

Faulty wiring, blown fuses, and tripped circuit breakers are all common HVAC problems that are relatively easy to identify and rectify. More substantial issues may result in poor performance over time. If the compressor or motor in your HVAC system is not working properly, it may be due to a problem with the electrical supply. This can result in less efficiency, greater use of energy and increased running costs.

Refrigerent Leaks

Common HVAC problems are often caused by low refrigerant levels. This can cause your HVAC system to work harder, leading to higher energy consumption and reduced cooling and heating capacity. Low refrigerant levels can be caused by a variety of factors such as corrosion and wear and tear and will usually develop over a period of time.

Fan Problems

When an HVAC develops a problem it can then lead to a number of other common HVAC problems. A poorly functioning fan can cause the system to overheat, leading to compressor failure and other issues.

Poor Airflow

There is a range of issues that can lower the airflow in your HVAC system. Leaky ductwork, blocked vents and other issues can lead to poor performance.

Wear & Tear

General wear and tear will impact the performance of your HVAC system. This can lead to reduced efficiency, lower performance and higher running costs. If not addressed, wear and tear can ultimately lead to system breakdown.

What parts of an HVAC system are most likely to fail?

HVAC systems are complex mechanical systems with a range of different components, and any one of them can fail at any time. These include:

Compressor

The compressor is responsible for compressing the refrigerant and circulating it throughout the system. Compressor failure is a common HVAC problem and can be caused by a range of factors, including electrical issues, refrigerant leaks, and poor maintenance.

Fan Motor

The fan motor is responsible for powering the fan blades and circulating air through the HVAC system. As with the compressor, problems can occur due to poor maintenance or electrical issues.

Capacitors

Capacitors store electrical energy and help to start the compressor and fan motors. When they fail, they cause the HVAC system to run poorly or not at all, reducing efficiency and higher energy consumption.

Filters

Filters remove dust, dirt and other contaminants from the air. Over time, these filters can become clogged, reducing airflow and increasing the wear and tear on the system.

Coils

The coils in an HVAC system transfer heat between the refrigerant and the air in the building. If the coils become corroded or dirty, their efficiency can be reduced leading to increased energy bills.

What to do if you have problems with your HVAC system

Regular scheduled maintenance can help reduce the risk of problems occurring with your HVAC system. These will ensure that critical components are working properly and that older components are replaced in a timely manner.

Often, HVAC systems can become more efficient over time as the usage of the building changes and develop. If the layout of the building changes then this will impact the performance of your HVAC system.

In this case, your HVAC system may need to be retro or re-commissioned. The commissioning process helps identify any design or installation issues that may affect the system’s performance or efficiency. This includes identifying any areas where the system may be leaking air, not providing adequate heating or cooling, or not maintaining appropriate humidity levels.

The HVAC specialists at ECS can ensure that your HVAC system is well-maintained and working as efficiently as possible.