Certified technical service

Navien Boiler Repair

Navien Boiler Repair for lockouts, no heat, ignition failure, flame loss, pressure faults, sensor errors, venting issues, condensate problems, pump faults, and hydronic performance issues.

Call 647-699-2474 Request Heating Service

Repair-first diagnostics

We test the system before recommending parts.

Modern boilers need proper diagnostics. A code points you in a direction. It does not prove which part failed.

Heating Experts is operated by YKT Inc. Service is focused on component-level testing, OEM parts where available, and proper startup verification after the repair.

Diagnostic focus

What we check during service.

Combustion and gas

We test inlet pressure, manifold pressure, gas valve operation, flame signal, grounding, ignition, and combustion readings where applicable.

Controls and sensors

We check control boards, ignition modules, NTC thermistors, pressure switches, limits, flame rods, igniters, wiring, and safety circuits.

Hydronic and venting

We verify water pressure, flow, pumps, zone controls, expansion, condensate drainage, venting, intake piping, and heat exchanger condition.

OEM parts and proper setup

Correct parts, correct setup, and proper verification.

Heating and mechanical equipment relies on exact safety tolerances, resistance readings, flame signal values, sensor readings, gasket fitment, timing, and control logic. The wrong part creates repeat failures and safety problems.

Repair sequence

Confirm the symptom and model information.
Test the failed circuit or component.
Quote the correct repair with OEM parts where available.
Install, set up, and verify safe operation.

Questions customers ask

Common service questions.

Do you repair before recommending replacement?

Yes. We test first. Replacement is discussed only after safety, part availability, repair cost, and equipment condition are reviewed.

Do you use OEM boiler parts?

Yes. Heating Experts uses genuine OEM parts through authorized factory distributors whenever available.

What do you check during boiler diagnostics?

We check gas pressure, ignition, flame signal, sensors, water pressure, flow, pumps, venting, condensate, combustion, wiring, and controls.

Related services

More Heating Experts service pages.

Brand service detail

Boiler faults we diagnose

No heat and lockouts

Ignition failure, flame failure, pressure faults, blocked condensate, and control board concerns.

Combustion and gas setup

Gas pressure, combustion analysis, burner condition, venting, and safe startup checks where required.

Hydronic system problems

Circulators, zone valves, expansion tanks, low pressure, air issues, and poor heat delivery.

Boiler maintenance Repair or replace guide

Technical service standards

Test before replacingControls, combustion, venting, condensate, water-side flow, and safeties are evaluated before a replacement recommendation.

OEM-correct repairsCorrect model-specific parts, gaskets, setup procedures, and startup testing are prioritized.

Documented findingsClear findings, repair scope, and approved pricing are reviewed before work proceeds.

Safety-led serviceGas, combustion, venting, electrical, and hydronic conditions are treated as one connected system.

Technical resources

Understand the system before approving the repair.

Use our knowledge hub for plain-language explanations of boiler lockouts, pressure problems, hydronic flow, combustion testing, condensate faults, OEM parts, and maintenance planning.

Browse technical guides Use heating help assistant

Boiler lockout diagnostics Boiler pressure problems Combustion analysis Expansion tank service Radiant floor heating Error-code guidance

Request service

Need Navien boiler repair?

Call Heating Experts for diagnostic-first service, OEM parts where available, and proper repair verification.

Call 647-699-2474