AC circuit board problems: troubleshooting and repairing circuit boardsAC systems are crucial in maintaining comfort in our homes and workplaces. However, circuit board malfunctions can disrupt functionality, causing discomfort and inconvenience. Let’s look at the various signs of circuit board problems in AC systems and troubleshooting and repair tips recommended by Irish Heating and Air Conditioning professionals.

Understanding Circuit Board Malfunctions

The circuit board, also known as the control board, acts as the brain of an AC system, regulating its operations and coordinating different components. Common causes of circuit board problems include power surges, overheating, and the natural aging and wear of the system.

Troubleshooting Circuit Board Problems

To troubleshoot circuit board problems, start by checking the power supply and ensuring a steady flow of electricity. Inspect the circuit board for physical damage, such as burnt components, loose connections, or corrosion. Clean the board and remove any dust or debris hindering its performance. Resetting the AC system by turning off the power for a few minutes and then turning it back on helps resolve minor issues. Here are common circuit board problems and how to repair them.

Faulty Power Supply

If the AC unit is not receiving power or circuit breakers are tripped, check the wiring and connections to ensure a secure and uninterrupted power supply.

Burnt Components

In case of burnt components on the circuit board, they must be replaced. Consult a professional technician to identify the faulty components and perform the necessary repairs.

Loose Connections

Inspect all connections on the circuit board and tighten any loose ones. Ensure that all wires are securely attached to their designated terminals.


Corrosion on the circuit board can hinder its performance. Clean the affected areas using a soft brush or cotton swab dipped in isopropyl alcohol. Be gentle to avoid damaging the components.


If the circuit board shows signs of overheating, check for proper airflow around the AC unit. Clear any obstructions that may block the vents or impede heat dissipation. Consider installing additional cooling measures, such as fans or heat sinks, to prevent future overheating.

Importance of Professional Inspections

Regular maintenance and inspections with professional HVAC technicians are essential. They can identify potential circuit board problems early, ensuring timely repairs and preventing further issues. Professionals possess the expertise to diagnose and troubleshoot circuit board problems accurately, providing efficient repair or replacement when necessary.

AC circuit board problems can significantly affect the performance and efficiency of your cooling system. By recognizing the signs of circuit board malfunction and following the troubleshooting and repair tips provided, you can resolve many issues on your own. However, it is crucial to schedule regular inspections with Irish Heating and Air Conditioning to promptly detect and address potential circuit board problems. Proper care and maintenance ensure you can keep your AC system running smoothly, providing uninterrupted comfort throughout the year.