Boiler Repair in Southfield, MI

This is often caused by trapped air in the system (an air lock) or by mineral buildup on the heat exchanger causing kettling. Air locks can sometimes be relieved by bleeding a radiator, but persistent noise or noise that gets worse over time should be checked by a technician before it causes bigger wear on the system.

This usually points to a stuck or failed zone valve, which controls which loop of the system gets hot water, or to trapped air in a specific radiator or loop. It's rarely the boiler itself failing outright — more often it's one component in a multi-zone system.

Boilers heat water or steam and circulate it through radiators or in-floor loops, while furnaces heat and blow air through ducts. The failure points are different — boilers develop circulation pump problems, zone valve issues, and pressure problems, while furnaces have igniter and heat exchanger issues. Diagnosing a boiler requires familiarity with hydronic heating specifically.

Most residential boilers run correctly in the 12-15 psi range when cold, though the exact number depends on the system and the height of your home. If the pressure gauge reads notably outside your system's normal range, or the pressure keeps dropping and needing refills, that points to a leak or a failing pressure relief valve worth having checked in Southfield.