Boiler Repair
No Heat · Losing Pressure · Leaking · Noisy · No Hot Water. Licensed boiler specialists diagnosing and fixing every boiler problem fast across Bellingham, Mount Vernon & Anacortes.
When Your Boiler Stops, Your Entire Home Goes Cold
A boiler doesn't have a backup. When it fails, every radiator, every baseboard, every radiant floor loop in your home goes cold at the same time. In a Northwest Washington winter, that means freezing pipes, uncomfortable nights, and real risk to your family and your property. Whether your boiler won't ignite, is losing pressure, leaking water, making banging noises, or delivering uneven heat, the problem won't fix itself and it will get worse.
LaVergne's diagnoses and repairs every type of boiler problem including ignition failure, pressure loss, circulator pump failure, zone valve malfunction, expansion tank failure, safety relief valve issues, leaking connections, air locks, kettling, and control board failures across Bellingham, Mount Vernon, Anacortes, and all of Whatcom and Skagit Counties.
What to Look for in a Boiler Repair Specialist
Boiler repair requires diagnosing pressurized hydronic systems, gas combustion components, electrical controls, and mechanical pumps and valves that all interact. A technician who guesses wrong replaces parts that aren't broken, misses the real cause, and leaves you with the same problem or a bigger one. Here's what separates a real boiler specialist from a costly mistake.
Why LaVergne's?
We check every box. Repairing boilers since 1951.
- Licensed & Insured (#LAVERPH798NZ)
- 75+ Years of Boiler Repairs
- All Boiler Types & Brands
- Upfront, Honest Pricing Always
- 5 Star Customer Reviews
- 24/7 Emergency Boiler Repair
Boiler Repair Services
Six core boiler repair areas covering every component, symptom, and failure mode, diagnosed and fixed by licensed boiler specialists.
Ignition & Pilot Repair
Failed igniter, dirty flame sensor, faulty gas valve, pilot assembly failure, or tripped safety lockout. We diagnose the exact ignition failure and restore heat fast with parts stocked on the truck.
Fix Now →Circulator Pump Repair
Seized pumps, noisy bearings, leaking seals, or pumps running but not moving water. We diagnose, repair, or replace circulator pumps and verify proper flow to every heating zone in your system.
Restore Flow →Zone Valve Repair
Stuck zone valves preventing heat to specific rooms, failed actuator motors, wiring issues between thermostats and valve heads, and valve bodies leaking. We repair or replace and verify heat to every zone.
Fix Zones →Pressure & Expansion Tank
Boiler losing pressure, expansion tank waterlogged, safety relief valve discharging, or pressure gauge reading too high or too low. We find the cause, repair, repressurize, and bleed the system.
Stabilize →Leak Repair
Leaking pipe connections, dripping valves, weeping circulator pump seals, or water under the boiler. We locate the exact source, repair the connection, and pressure test to verify the fix.
Stop Leak →Controls & Aquastat
Aquastat calibration, control board diagnosis, thermostat wiring repair, high limit reset, low water cutoff testing, and zone controller troubleshooting for boilers that cycle incorrectly or won't respond.
Diagnose →Boiler Down? No Heat?
24/7 emergency boiler repair across Bellingham, Mount Vernon, Anacortes and all surrounding areas.
Most Common Boiler Problems We Repair
Boilers are reliable systems, but they operate under pressure with combustion, mechanical pumps, electrical controls, and dozens of connections that all wear over time. Northwest winters push these systems hard. Here are the four boiler problems we repair most often.
Our trucks carry circulator pumps, zone valves, expansion tanks, pressure relief valves, igniters, aquastats, and bleeding tools so most boiler repairs are completed in a single visit.
Boiler Won't Ignite
Failed igniter, dirty flame sensor, faulty gas valve, or tripped safety lockout. We diagnose the exact cause and restore heat fast, usually with parts already on the truck.
Fix It →Losing Pressure
Failed expansion tank, leaking relief valve, air in the system, or a leak in the hydronic loop. We find the source, repair, repressurize, and bleed the entire system.
Diagnose →No Heat to One Zone
Stuck zone valve, failed circulator pump, thermostat wiring issue, or air lock in the loop. We trace the problem through the zone and restore heat to the affected rooms.
Restore →Banging & Kettling
Air trapped in the system, scale buildup on the heat exchanger, or a failing circulator pump. We bleed, flush, descale, or replace components to eliminate noise and restore quiet operation.
Resolve →
Why Professional Boiler Repair Matters
A boiler is a pressurized vessel that heats water using gas combustion and circulates it through a closed loop under pressure. Improper repair creates carbon monoxide exposure from cracked heat exchangers, dangerous pressure buildup from incorrect expansion tank settings, water damage from botched connections, gas leaks from bad fittings, and repeat failures from misdiagnosis.
Licensed boiler specialists diagnose systematically, test before and after every repair, perform combustion analysis, verify pressure and safety devices, bleed air from the system, and ensure the entire hydronic loop operates safely before leaving.
Root Cause
Diagnose the real problem
Safety Verified
CO and pressure tested
Permanent Fix
Proper repair, not a patch
Boiler Repair FAQs
Common boiler repair questions answered by our licensed specialists serving Whatcom and Skagit Counties.
How much does a boiler repair cost?
Most boiler repairs run $200 to $800 depending on the component. Circulator pump swaps, zone valve replacements, and expansion tank service are on the lower end. Heat exchanger or control board work runs higher. We always quote upfront.
Why is my boiler not firing?
The most common causes are a failed igniter, dirty flame sensor, faulty gas valve, tripped high limit safety, or a control board issue. We systematically test each component to find the exact cause and restore heat fast.
Why is my boiler losing pressure?
Common causes include a failed expansion tank, leaking pressure relief valve, air trapped in the system, or a small leak in the hydronic loop. We pressure test, find the source, repair it, and repressurize.
Why is only one zone not heating?
Usually a stuck zone valve, failed circulator pump, thermostat wiring issue, or an air lock in that loop. We trace the problem, repair the failed component, and verify heat is restored to every room.
Why is my boiler making noise?
Banging, gurgling, or kettling sounds are caused by air in the system, scale on the heat exchanger, or a failing pump. We bleed, flush, descale, or replace components to eliminate the noise.
Should I repair or replace my boiler?
If your boiler is under 20 years old and the repair is a pump, valve, or tank, repair makes sense. Over 25, cracked heat exchanger, or frequent repairs means replacement is safer and more cost effective.
Do you carry parts on your trucks?
Yes. Our trucks stock circulator pumps, zone valves, expansion tanks, relief valves, igniters, flame sensors, aquastats, and bleeding tools so most boiler repairs are completed in a single visit.
Do you offer 24/7 emergency repair?
Yes. When your boiler fails in freezing weather, we respond 24/7. A boiler failure in winter risks frozen pipes and serious property damage. Call us anytime and we will get there fast.
What areas do you serve?
We repair boilers across all of Whatcom and Skagit Counties including Bellingham, Mount Vernon, Anacortes, Burlington, Sedro Woolley, Ferndale, Lynden, and surrounding areas.