Boiler Repair in Harrison, NJ

Radiators stay cold while the boiler runs hot

When the boiler fires but radiators never warm up, you may have a failed circulator pump, severe sludge buildup, or airlocks blocking flow. Running a boiler this way wastes fuel and strains the heat exchanger. It needs diagnosis promptly, because the underlying cause only gets worse with each heating cycle.

Banging, kettling, or gurgling from the boiler

Loud noises usually mean limescale on the heat exchanger (kettling), trapped air, or low water pressure causing steam pockets. These sounds signal the system is working too hard. Left alone, the stress can crack sections or burn out the pump, turning a service call into a replacement.

Pressure gauge keeps dropping to zero

A boiler that constantly loses pressure likely has a leak — at a valve, joint, radiator, or inside the unit itself — or a failed expansion vessel. Topping it up repeatedly masks the problem while water damage spreads. A technician should find and fix the source, not just refill the system.

Pilot light or burner keeps cutting out

Repeated lockouts point to a faulty thermocouple, blocked flue, failing gas valve, or overheating heat exchanger. Modern boilers lock out as a safety measure, so frequent resets are the system telling you something is wrong. Continued resetting without repair risks carbon monoxide issues with gas units.

Heating bills climbing with no change in use

When fuel costs rise but your habits haven't, efficiency has dropped — often from a scaled heat exchanger, poor combustion setup, or a boiler simply past its prime. A tune-up and combustion analysis usually reveals the cause. If the unit is decades old, replacement math starts to favor a new system.