Written on: April 27, 2026
A reliable heating and cooling system is the heartbeat of a comfortable home. When your heat pump starts making strange noises or stops producing warm air, it can disrupt your family’s routine and leave you worried about unexpected repair costs.
Our technicians at Williams Energy have spent years helping homeowners across Plymouth, MA, and nearby South Shore towns maintain their indoor comfort. We have seen just about every HVAC issue imaginable.
To help you protect your investment and maintain a comfortable living space, we put together this quick guide. You will learn how your system operates, the unique benefits it brings to your property, and how to troubleshoot the most common problems before calling for backup.
Unlike traditional furnaces that burn fuel to generate heat, heat pumps transfer heat from one place to another. During the winter, the system extracts warmth from the outside air and pumps it into your home. In the summer, the process reverses, pulling heat from inside your house and releasing it outdoors. Because they move heat rather than create it, these systems are incredibly efficient.
Heat pumps are highly adaptable and are a perfect fit for homeowners looking to boost their property value while reducing their carbon footprint. Whether you are living in a newly constructed home with modern insulation or upgrading an older property during a renovation, heat pumps can be tailored to meet your specific square footage and layout needs.
Upgrading to a heat pump offers a variety of benefits that directly impact your wallet and your daily comfort.
Even the most reliable systems occasionally run into hiccups. Here are a few common issues you might encounter and the steps you can take to resolve them.
The system Is blowing cold air in winter: If your heat pump is pushing out cold air when it should be warming your home, check your thermostat first. Ensure it is set to “Heat” and that the fan is set to “Auto” rather than “On.” If the fan runs continuously, it will blow unheated air between heating cycles. Next, inspect your air filters. A clogged filter restricts airflow and can cause the system to malfunction. Replacing a dirty filter is a simple DIY project that can instantly restore efficiency.
Ice buildup on the outdoor unit: Seeing a little frost on your outdoor unit during the winter is normal. The system has a built-in defrost cycle to melt this frost away. However, if the entire unit is encased in a thick layer of ice, you have a problem. Turn the system off to prevent damage to the compressor. Clear away any snow, leaves, or debris blocking the airflow around the unit. If the ice does not melt or quickly returns, you likely have a refrigerant leak or a faulty defrost control board, which requires professional attention.
Unusual and loud noises: A gentle hum is normal, but grinding, rattling, or screeching sounds are warning signs. Rattling might just be a loose cover panel that you can easily tighten with a screwdriver. Grinding or screeching noises usually point to failing motor bearings. If you hear metal-on-metal sounds, turn off the system immediately and contact a technician to prevent permanent damage to the internal components.
Tackling basic troubleshooting can save you time, but some issues require an expert touch. Williams Energy provides expert installation and service of heat pumps to ensure your home stays comfortable and energy-efficient all year long.
To give you true peace of mind, we offer cost-effective heat pump service plans that include an annual tune-up along with coverage for many parts for repairs. Regular maintenance is the best way to extend the lifespan of your appliance, prevent unexpected breakdowns, and keep your energy bills low.
Ready to boost your home value and save on energy costs? Contact the team at Williams Energy today to schedule your annual tune-up or discuss upgrading your current system.