Boiler Repair is needed when your boiler stops heating, leaks water, loses pressure, makes noise, shows error codes, or fails to provide hot water. Bernoulli Heating and Cooling repairs residential boilers, combi boilers, condensing boilers, radiant floor heating systems, and hydronic heating systems across Metro Vancouver and the Fraser Valley.

If your boiler mainly needs seasonal maintenance, visit annual boiler maintenance. If your system is old, unsafe, or no longer worth repairing, review high-efficiency heating upgrade options.

Common Boiler Problems We Repair

  • Boiler not heating
  • No hot water
  • Boiler leaking water
  • Boiler pressure too low
  • Boiler pressure too high
  • Boiler making banging or gurgling noise
  • Boiler keeps shutting off
  • Boiler error codes
  • Circulator pump failure
  • Expansion tank problems
  • Zone valve failure
  • Baseboard heating not working
  • Radiant floor heating not working
  • Uneven heat between rooms
  • Combi boiler problems
  • Condensing boiler lockouts

Boiler Not Heating

A boiler can appear to run but still fail to heat the home. The problem may not always be inside the boiler itself. Hydronic systems rely on pumps, valves, thermostats, controls, air removal, pressure, and water circulation. One weak component can make the whole system act useless. Wonderful engineering. Very dramatic.

Common causes include:

  • Circulator pump failure
  • Zone valve stuck closed
  • Low system pressure
  • Air trapped in the heating loop
  • Thermostat problem
  • Control board issue
  • Ignition failure
  • Blocked heat exchanger
  • Venting problem

No Hot Water From Boiler

Many homes use combi boilers for both space heating and domestic hot water. If you have heat but no hot water, the issue may involve the domestic hot water side of the system.

  • Flow sensor failure
  • Domestic hot water sensor issue
  • Plate heat exchanger scaling
  • Mixing valve problem
  • Control board fault
  • Internal circulation issue

If you have hot water but no heat, the issue often points to the heating distribution side: pumps, zone valves, thermostats, or air inside the hydronic loop.

Boiler Leaking Water

A leaking boiler should be checked quickly. Small leaks can damage components, flooring, cabinets, and nearby electrical controls.

  • Pressure relief valve leaking
  • Expansion tank failure
  • Pump seal leak
  • Pipe connection leak
  • Air separator leak
  • Heat exchanger leak
  • Corroded fittings

The leak location matters. A small fitting leak is very different from a heat exchanger leak. Guessing here is how repair bills become depressing little novels.

Boiler Pressure Problems

Boiler Pressure Too Low

Low pressure can stop a boiler from operating properly.

  • Hidden system leak
  • Air recently bled from system
  • Faulty fill valve
  • Expansion tank issue
  • Pressure sensor fault

Boiler Pressure Too High

High pressure can trigger relief valve discharge or shutdowns.

  • Failed expansion tank
  • Overfilled system
  • Faulty pressure reducing valve
  • Temperature control issue
  • Incorrect system setup

Boiler Making Noise

Boiler noises often point to water movement, air, pressure, or scaling problems.

Noise Possible Cause Repair Focus
Banging Air, scaling, overheating, circulation issue System diagnosis
Gurgling Air in system, low pressure Bleeding and pressure check
Whistling Restricted flow, scaling Flow and heat exchanger check
Vibration Pump issue, loose parts Pump and mounting inspection

Circulator Pump Problems

The circulator pump moves heated water through the heating system. If the pump fails, the boiler may heat water but the home still stays cold. Naturally, the system chooses the most confusing failure possible.

  • No heat in zones
  • Pump not running
  • Pump making noise
  • Hot boiler with cold baseboards
  • Uneven heat distribution

Expansion Tank Problems

The expansion tank controls pressure changes as water heats and expands. A failed expansion tank can cause pressure spikes, relief valve discharge, and repeated system problems.

  • Pressure rises too high
  • Relief valve leaks
  • Boiler pressure fluctuates
  • System needs frequent refilling

Zone Valve Problems

Zone valves control heat to different areas of the home. If one zone is cold while others work, the zone valve may be stuck, failed, or not receiving a proper signal.

  • One area has no heat
  • Zone does not open
  • Thermostat calls but heat does not arrive
  • Motorized valve failure
  • End switch problem

Baseboard Heating Not Working

Hydronic baseboard systems depend on proper hot water flow. Cold baseboards may be caused by air, pump problems, stuck zone valves, or pressure issues.

  • Air trapped in baseboards
  • Low system pressure
  • Failed circulator pump
  • Zone valve issue
  • Blocked piping

Radiant Floor Heating Problems

Radiant floor heating is comfortable when it works and annoying when one room decides to become a refrigerator.

  • Cold floor zones
  • Uneven floor temperature
  • Manifold balancing problems
  • Air in loops
  • Actuator failure
  • Mixing valve issue
  • Circulation problem

Condensing Boiler Repair

High-efficiency condensing boilers require proper venting, drainage, combustion setup, and maintenance.

  • Condensate drain blockage
  • Ignition lockouts
  • Flame failure
  • Venting problems
  • Heat exchanger fouling
  • Error codes
  • Sensor failures

Combi Boiler Repair

Combi boilers provide heating and domestic hot water from one system. Problems may affect heating, hot water, or both.

  • No domestic hot water
  • Hot water goes cold
  • Heat works but hot water does not
  • Hot water works but heating does not
  • Flow sensor issue
  • Plate heat exchanger scaling
  • Internal diverter valve problem

Boiler Brands We Repair

  • Navien
  • Viessmann
  • Bosch
  • Rinnai
  • IBC
  • NTI
  • Lochinvar
  • Weil-McLain
  • Triangle Tube
  • Slant/Fin

Repair or Replace Your Boiler?

Situation Repair May Make Sense Replacement May Make Sense
Age Under 12–15 years 15–20+ years
Issue Single failed component Repeated failures
Parts Parts available Parts discontinued
Efficiency Still performs well High fuel bills
Safety No venting concern Combustion or venting issues

If replacement is the smarter option, see modern hydronic heating solutions.

Boiler Repair Service Areas

Why Choose Bernoulli Heating and Cooling?

Boiler systems are not just one appliance. They are a complete heating network made of controls, pumps, valves, sensors, piping, venting, pressure components, and distribution loops.

Bernoulli Heating and Cooling focuses on full-system diagnosis instead of replacing random parts and hoping physics becomes cooperative. We check boiler operation, pressure, circulation, controls, venting, pumps, zone valves, expansion tanks, and heating distribution before recommending repairs.

Homeowners choose us because we provide honest recommendations, clean workmanship, safe gas appliance service, and practical repair advice based on real HVAC field experience.

Call +1-604-518-4438 for professional Boiler Repair service.

FAQ – Boiler Repair

Why is my boiler not working?

Your boiler may not work because of ignition failure, low pressure, pump problems, control faults, venting issues, or sensor failures.

Why is my boiler leaking?

Boiler leaks may come from relief valves, pump seals, expansion tanks, pipe fittings, air separators, or heat exchangers.

Why is my boiler losing pressure?

Pressure loss often points to leaks, air removal, faulty fill valves, expansion tank problems, or relief valve issues.

What is normal boiler pressure?

Normal pressure depends on system design, but many residential hydronic systems operate around 12–20 psi when cold or warm. A technician should confirm the correct range for your system.

Why do I have hot water but no heat?

This usually points to circulator pumps, zone valves, thermostats, air in the system, or heating distribution problems.

Why do I have heat but no hot water?

For combi boilers, this may involve flow sensors, domestic hot water sensors, plate heat exchangers, diverter valves, or control issues.

Why is my boiler making noise?

Noise may come from air in the system, low pressure, scaling, pump problems, or water circulation issues.

Why does my boiler keep shutting off?

Frequent shutdowns may be caused by flame failure, pressure faults, overheating, venting problems, sensor issues, or control board problems.

Can a circulator pump fail?

Yes. A failed pump can stop hot water from moving through the heating system, leaving baseboards or radiant floors cold.

Why are my baseboards cold?

Cold baseboards may be caused by air in the loop, zone valve problems, pump failure, low pressure, or blocked piping.

Why is my radiant floor not heating?

Radiant floor issues may involve air in loops, actuator problems, manifold balancing, mixing valves, pump failure, or control problems.

Should I repair or replace my boiler?

Repair usually makes sense for newer systems with isolated failures. Replacement may make more sense for older boilers with repeated breakdowns, poor efficiency, or discontinued parts.