Boiler Repair Services

• Rumbling, Kettling, or Whistling Noises: Loud bangs or rumbles are classic signs of mineral or sludge buildup (hard water scale) on the heat exchanger, causing overheating and trapped steam.
• Leaking or Dripping Water: Found at the pressure relief valve, pump seals, or pipe unions. A leaking relief valve often indicates excessive system pressure; leaking seals mean worn components.
• Low Pressure Gauge Reading: If the gauge is below 12-15 PSI, the system needs water added. If it keeps dropping, you have a hidden leak in the piping, a radiator, or the boiler itself.
• Pilot Light Won't Stay Lit (Older Gas Boilers): Usually a faulty thermocouple that's not sensing the flame, telling the gas valve to shut off.
• Yellow or Flickering Burner Flame: A dangerous sign of improper combustion, likely due to a dirty burner or venting issue, posing a carbon monoxide risk.
• Constant On/Off Cycling: The boiler fires up, shuts off after a minute, then repeats. This can be a faulty aquastat, blocked vent, or a system that's too large for the home.

Our Specialized Boiler Repair Services

We repair all types of residential boilers—gas, oil, steam, and hot water systems:

• Circulator Pump & Zone Valve Replacement: Restoring the heart of your hot water circulation system.
• Pressure Control Repair: Fixing or replacing faulty pressure relief valves, expansion tanks, and pressure-reducing valves.
• Aquastat & Control Module Diagnostics: Repairing the brain of the boiler that controls water temperature and operation.
• Low-Water Cutoff Service & Replacement: A critical safety device for steam boilers; we clean, test, and replace it as needed.
• Burner Assembly Cleaning & Adjustment: Removing soot and debris and adjusting the air/fuel mixture for safe, efficient combustion.
• Heat Exchanger Inspection & Flushing: Checking for cracks or leaks and performing a power flush to remove damaging sludge and scale buildup.
• Leak Diagnosis & Repair: Locating and fixing leaks at joints, valves, and, when possible, within sections of the boiler itself.
• System Venting & Bleeding: Removing air pockets from pipes and radiators that block hot water flow.

The Boiler Repair vs. Replacement Crossroads

We provide honest, clear advice to help you decide. A Repair Makes Sense When:

• The boiler is less than 15 years old.
• The repair is isolated (e.g., a single circulator pump, a thermocouple).
• The system has been well-maintained and this is its first significant issue.

Replacement Should Be Considered When:

• The boiler is over 20 years old.
• The heat exchanger is cracked or leaking—this is a core failure.
• You're facing multiple component failures in one season.
• Rust-colored water is a sign of widespread internal corrosion.
• Repair costs are approaching 50% of the price of a new, high-efficiency unit.

The 551 HVAC Boiler Repair Promise

• We Understand Hydronic Systems: We specialize in the unique mechanics of water-based heat, not just forced-air systems.
• Safety-Centric Approach: We test for carbon monoxide, verify proper venting, and check all safety controls on every repair call.
• We Explain the "Why": We’ll show you the failed part, explain what caused it, and what we’re doing to fix it permanently.
• Respect for Your Home: We lay down floor protection, manage water carefully during any pipe work, and clean up thoroughly.

Don't Endure a Cold Home. Call the Boiler Experts.

A boiler problem won't fix itself. Delaying repair often leads to more extensive damage, higher costs, and prolonged discomfort for your family.