Lochinvar Knight XL Series Boiler Service in Greater Vancouver

Want a straight answer for your home? Call (604) 359-1081 or request a free written quote.

About the Lochinvar Knight XL Series

The Lochinvar Knight XL is a high-output condensing boiler line built for larger heating loads than the standard Knight series, commonly used in bigger homes, mixed-use buildings, and light-commercial mechanical rooms across Metro Vancouver. Like other Knight-family boilers, the XL is a heat-only unit designed for space heating, typically paired with a separate domestic hot water source.

Because Knight XL units often serve larger or multi-zone systems, correct sizing, venting, and hydronic piping design matter more than on a smaller residential boiler — an oversized or undersized XL will short-cycle or fail to reach design temperature. Many Knight XL installs in this region are cascaded (multiple units piped together) to add redundancy and match total building load.

CANRO's licensed gasfitters and Red Seal technicians service Knight XL boilers as an independent contractor. We are not a Lochinvar-authorized dealer or factory service centre, and we say so plainly rather than implying an affiliation we don't have.

Signs Your Knight XL Needs Attention

• Uneven heat across zones or rooms that don't reach set temperature
• Frequent lockouts, error codes, or dropping out of a cascade sequence
• Short-cycling or unusually long burner run times
• Condensate leaks or corrosion near the vent or condensate neutralizer
• Rising gas usage without a matching increase in heating demand
• Circulator pump noise or reduced flow through the primary loop
• Pressure relief valve weeping or expansion tank pressure that won't hold

Repair & Diagnostics

When a Knight XL unit faults out or underperforms, our technicians run a full diagnostic on the gas train, ignition system, heat exchanger, condensate path, and control logic. On cascade systems, we also check how the lead-lag controller is sequencing the units, since a fault on one boiler can throw off the whole plant's staging. Every repair visit includes a written diagnosis and a free written quote before we touch anything beyond the initial inspection.

We don't push a replacement when a repair will do, and we don't upsell parts that aren't the actual problem.

Installation & Replacement

For new construction, retrofits, or end-of-life replacements, CANRO handles Knight XL installation from permit through commissioning, including sizing the unit or cascade to the building's actual heating load, venting per current code, condensate neutralization where required, and coordinating Technical Safety BC gas and boiler permits.

Boiler installation typically runs $6,500–$14,000+ depending on unit size, venting complexity, and ancillary equipment needs; full boiler replacement projects generally run $7,500–$15,000+, with cascade systems trending toward the higher end. Every quote is written and itemized before work starts.

Parts Replacement

CANRO sources and installs replacement parts for Lochinvar Knight XL boilers, including:

• Gas valves and gas train components
• Ignitors and flame sensors
• Heat exchangers
• Circulator pumps
• Pressure relief valves (PRVs)
• Expansion tanks
• Combustion air fans and blower assemblies
• Temperature and pressure sensors
• Control boards and cascade sequencing modules

Lead times on some larger boiler parts can run longer than standard residential equipment, so we confirm availability during the diagnostic visit and give you a realistic timeline before ordering.

Annual Maintenance & Tune-Up

High-output condensing boilers like the Knight XL perform best with scheduled annual maintenance, and many property management contracts require it. A CANRO tune-up typically includes combustion analysis, heat exchanger and burner inspection, condensate trap service, gas pressure checks, safety control testing, and a review of cascade sequencing where applicable.

Regular maintenance also supports Technical Safety BC gas safety compliance and helps catch a failing part before it causes an unplanned heat outage during a cold snap.

Common Fault Behaviour

We won't list specific Lochinvar fault codes here unless we're fully confident they're accurate for the Knight XL control platform, since guessing at codes leads to wasted service calls. In general, repeated lockouts on startup, a unit that fires briefly then shuts down, or a cascade controller that skips a unit point to a control or ignition fault. Our technicians read the actual fault history off the control panel during the service call rather than diagnosing over the phone.

Cost Guidance

Repair and parts costs vary too much by fault, part availability, and building access to quote a number without a technician on site. Every CANRO repair visit starts with a diagnostic call-out and ends with a free written quote. For new installations or full replacement, expect a project in the $6,500–$14,000+ (install) or $7,500–$15,000+ (replacement) range, with final pricing depending on unit size, cascade configuration, and venting.

Rebates & Financing

The federal Canada Greener Homes Grant closed in 2024, but the Canada Greener Homes Loan may still apply to qualifying upgrades, and CleanBC and FortisBC both maintain rebate programs for high-efficiency gas equipment that can apply depending on project type. We help confirm current eligibility and paperwork at the time of your project rather than quoting fixed dollar amounts here.

Why CANRO

CANRO Heating & Cooling is a Burnaby-based, independent licensed contractor serving Metro Vancouver since 1999, holding Technical Safety BC gas licence LGA0043870 and boiler licence LBP0046450. Our technicians are Red Seal certified, and the company carries WorkSafeBC and liability insurance. We're rated 4.9 stars from 85+ Google reviews. We offer same-day and after-hours service for urgent boiler plant failures, and every job starts with an honest diagnosis and a free written quote.

Frequently asked questions

Part of the CANRO Lochinvar boiler services hub — see every related service there.

Reviewed by the CANRO Heating & Cooling service team — July 06, 2026. Technical Safety BC gas licence LGA0043870 · boiler licence LBP0046450 · Red Seal certified · WorkSafeBC and liability insured · 4.9★ from 85+ Google reviews · serving Metro Vancouver since 1999 · (604) 359-1081.