Boiler Repair Service

ProLine Service · YKT Inc. · Mazgan Inc..

Boiler Repair Service

Boiler not heating, locking out, losing pressure, leaking, making noise, or giving error codes. ProLine Service handles hydronic boiler diagnostics and repair.

Boiler and hydronic heating repair

Boiler problems can come from pumps, controls, pressure issues, air in the system, expansion tanks, zone valves, sensors, gas pressure, venting, or combustion problems. We diagnose the boiler and the hydronic system around it.

  • No heat and lockout diagnostics
  • Circulator pump and zone control checks
  • Pressure, expansion tank, and relief valve issues
  • Combi boiler and tankless heating service
  • Annual maintenance and combustion setup

Boiler maintenance matters

A boiler should be cleaned, checked, and tested regularly. Maintenance helps catch combustion issues, blocked drains, venting problems, weak pumps, and control faults before they become no-heat calls.

Questions customers ask

Common questions about boiler repair service.

Why does my boiler keep locking out?

Lockouts can come from ignition failure, flame sensing, low water pressure, blocked venting, condensate problems, bad sensors, or control issues.

Why does my boiler pressure keep dropping?

Pressure loss can come from a leak, bad expansion tank, relief valve discharge, air removal, or a problem in the hydronic piping.

Do combi boilers need annual service?

Yes. Combustion, condensate, venting, heat exchanger condition, water pressure, and controls should be checked yearly.

Should I repair or replace my boiler?

Repair is often worth it when the heat exchanger is sound and parts are available. Replacement makes more sense with repeated failures, poor installation, or major corrosion.

Service areas

Serving York Region, Durham Region, and Simcoe County.

York Region

Vaughan, Aurora, Newmarket, Richmond Hill, Markham, King, East Gwillimbury

Durham Region

Pickering, Ajax, Whitby, Oshawa, Clarington, Uxbridge

Simcoe County

Barrie, Innisfil, Orillia, Bradford, Georgina

Need service today?

Pool heater, AC, boiler, and HVAC calls handled by ProLine Service.

Call 437-524-0866