Boiler Service & Repair | Derry, NH

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Boilers are the primary heating system in many Derry, NH homes, particularly those built before the 1980s with cast iron baseboard radiators. When a boiler fails, the whole house loses heat. The Air Department provides boiler repair and service throughout Derry and southern New Hampshire, with fast response and straight diagnosis. Brad is licensed for gas, oil, and propane boiler work in both New Hampshire and Massachusetts.

Hot water boilers work by heating water and circulating it through baseboard radiators or radiant floor tubing throughout the house. When something goes wrong, the symptoms can range from no heat in a single zone to a complete loss of heat across the house. Common boiler problems include a failed circulator pump, a stuck zone valve, a faulty pressure relief valve, air in the system causing banging and uneven heat, or a problem with the burner itself. Brad carries the most common parts on his truck and can resolve many boiler issues in a single visit.

One of the more common service calls Brad handles is boiler systems that have lost pressure or developed a leak. A boiler system that is constantly losing pressure usually has a leak somewhere in the distribution piping, a failed expansion tank, or a pressure relief valve that is weeping. These are straightforward repairs when caught early. Left alone, a slow leak can cause corrosion throughout the system and lead to a much more expensive fix down the road.

Annual boiler service is one of the most cost-effective maintenance investments you can make. A yearly tune-up includes cleaning the heat exchanger, testing combustion efficiency, checking the pressure and temperature relief valve, bleeding air from the system if needed, and verifying all zone controls are working correctly. A well-maintained boiler runs more efficiently, uses less fuel, and lasts significantly longer than one that only gets looked at when something breaks.

What's Included

✓ Boiler diagnostics and repair
✓ Circulator pump replacement
✓ Zone valve repair and replacement
✓ Pressure relief valve service
✓ Expansion tank replacement
✓ Air bleeding and system balancing
✓ Burner cleaning and adjustment
✓ Annual boiler tune-ups and maintenance

Common Questions About Boiler Service & Repair in Derry, NH

Why is my boiler making banging or knocking noises?

Banging or knocking in a boiler system is usually caused by air trapped in the distribution piping, a kettling boiler (scale buildup on the heat exchanger), or a malfunctioning circulator pump. Air in the system is the most common cause and is fixed by bleeding the system. Brad can diagnose the exact cause during a service call.

My boiler keeps losing pressure — what is causing that?

A boiler that keeps losing pressure has a leak somewhere in the system. Common sources are a failed expansion tank, a weeping pressure relief valve, or a small leak in the distribution piping or at a baseboard connection. Brad will find the source and repair it. Running a low-pressure boiler for too long can cause the system to shut down on safety and accelerate wear.

How often should a boiler be serviced in New Hampshire?

Once a year, before the heating season. A fall tune-up ensures the system is ready for winter and catches problems while you still have time to get a part ordered and installed before cold weather hits. Most boiler problems that turn into emergencies in January were detectable in October.

Do you work on both gas and oil boilers?

Yes. Brad services gas, propane, and oil boilers throughout Derry and southern NH. He holds NH Gas Fitting License 2413287 and MA Gas License PL17827, and is licensed for oil burner work in Massachusetts (BU-31852). He works on all major brands including Weil-McLain, Burnham, Buderus, and Peerless.

Ready to Schedule?

Call or text Brad directly, or fill out the estimate form.

📞 Call (603) 315-7227 Request a Free Estimate

Boiler Service & Repair in Derry, NH & Southern New Hampshire