Navien and Rinnai Tankless Specialists
A tankless water heater displaying an error code, cutting out mid-shower, or producing temperature swings between scalding and cold is a computerized system telling you something specific is wrong. These are not generic plumbing problems. Diagnosing a tankless unit requires interpreting manufacturer error codes, testing gas pressure, measuring water flow rates, and inspecting the heat exchanger for scale buildup. Eaton's Heating provides same-day tankless water heater repair across all Surrey neighborhoods from our Coquitlam base. We specialize in Navien and Rinnai systems and service all other major tankless brands. Every service call starts with a $189 diagnostic fee. Additional work is quoted upfront with parts typically starting at $150 to $200 per component. We also offer descaling service to restore flow and prevent future failures.
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Tankless water heaters are computerized appliances that communicate through error codes, and each brand has its own code system. A Navien unit flashing E003 has a different problem than one showing E012, and both require different diagnostic approaches. Rinnai systems use a separate error code structure entirely. Our technicians are trained on the diagnostic procedures for both platforms and carry the tools to interpret codes, test gas pressure, measure water flow, check ignition components, and inspect heat exchangers on every service call.
The most common tankless water heater problems we see in Surrey include ignition failures from dirty flame rods or gas supply issues, temperature fluctuations caused by mineral scale restricting flow through the heat exchanger, low water flow errors triggered by clogged inlet filters or undersized gas lines, venting faults from blocked or improperly installed vent terminations, and sensor or control board failures. Metro Vancouver's water has moderate mineral content that accumulates inside the narrow passages of a tankless heat exchanger over time. This scale buildup is the single most common cause of temperature inconsistency, efficiency loss, and error codes in tankless systems across Surrey. We offer descaling as a standalone service to flush out mineral buildup, restore flow and temperature stability, and help prevent the system lockouts that lead to emergency repair calls.
Homes across Newton, Fleetwood, and Fraser Heights that installed tankless systems during renovations in the 2010s are now reaching the age where scale-related issues, flame rod fouling, and sensor wear become common. South Surrey and Panorama Ridge homes with higher hot water demand from multiple bathrooms put more strain on their tankless units and may need descaling more frequently. Cloverdale and Grandview Heights newer builds with tankless units installed during construction are typically still within the early years of operation but can develop issues from improper initial installation, undersized gas lines, or venting problems that surface over time.
We are a FortisBC Trade Ally, BBB A+ rated, and Technical Safety BC licensed under LGA0200006 with over 20 years of tankless water heater repair experience across Greater Vancouver. Our 400+ five-star Google reviews and 4.9 average rating reflect expert diagnosis on these specialized systems that many general plumbers and HVAC companies are not equipped to handle. All repairs use CSA certified parts backed by a six-month parts and labour warranty.
For homeowners whose tankless unit is beyond cost-effective repair, we also install new Navien and Rinnai tankless systems. Navien's NPE-S2 series is our most popular replacement for aging units, and the NPE-A2 series with ComfortFlow recirculation provides instant hot water at every fixture. Rinnai's SENSEI RX and RXP (with built-in recirculation pump), along with the RUS non-condensing and RUCS condensing models, round out the lineup. For homeowners considering switching to a conventional hot water tank, we explain the trade-offs clearly. We also service furnaces and all other HVAC systems across all of Surrey.
Tankless water heaters in Surrey homes range from Navien combis that provide both space heating and domestic hot water to dedicated Rinnai units handling hot water only. The diagnostic approach varies by brand, model, and configuration. On Navien systems, we interpret the unit's built-in diagnostic display, test flow sensors and thermistors, verify gas pressure, and inspect the heat exchanger for scale. On Rinnai systems, we read error code sequences, test ignition components, verify water flow rates, and check the venting system for obstructions or condensation issues. Homes in Sullivan, Bear Creek, Whalley, and Guildford with tankless units installed by other contractors sometimes have gas line or venting issues from the original installation that cause intermittent problems years later.
For homeowners weighing tankless repair versus replacement, we provide transparent pricing on both options. Visit our rebates page for information on any active incentive programs that may apply to a new tankless installation. We also provide tankless water heater service across the entire Lower Mainland.
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Have a question about your HVAC system? Book an appointment using the form below, or call (604) 535-8434 for immediate help.
Yes. We offer same-day tankless water heater repair across all Surrey neighborhoods. Our technicians are dispatched from our Coquitlam base and typically reach Surrey within 30 minutes via Highway 1. We specialize in Navien and Rinnai systems and carry common tankless components on every truck. Call (604) 535-8434 to book.
The most common cause is mineral scale buildup restricting flow through the heat exchanger, which reduces the unit's ability to maintain consistent temperature under demand. A clogged inlet filter reducing water flow below the unit's activation threshold, a failing temperature sensor, or a gas supply issue affecting burner output can also cause mid-shower temperature drops. We diagnose the specific cause during the $189 service call and restore consistent hot water.
Most homes in Surrey and the Lower Mainland benefit from descaling once per year due to the region's moderate mineral content. Homes with higher hot water demand or harder water may need service more frequently. Descaling is a standalone service that flushes a descaling solution through the heat exchanger to remove mineral buildup, restore flow rates and temperature stability, and prevent the error codes and system lockouts that lead to emergency repair calls. We offer descaling as a separate service from standard diagnostics and repair.
Each tankless brand uses its own error code system. Navien codes like E003 (ignition failure), E012 (false flame detection), and E016 (overheating) each point to specific components. Rinnai uses numeric codes like 11 (no ignition), 12 (flame failure), and 14 (thermal fuse). Rather than guessing from online forums, call for a professional diagnostic. Our technicians are trained on Navien and Rinnai error code systems and can interpret the code, test the related components, and quote the repair during a single service visit.
Every service call starts with a $189 diagnostic fee. Parts typically cost $150 to $200 or more per component on top of the diagnostic, depending on what has failed. Common repairs include flame rods, ignition boards, flow sensors, and thermistors. Descaling is priced separately as a standalone service. We quote all work upfront and you approve it before we start. All parts are CSA certified and backed by our six-month warranty.
We specialize in Navien and Rinnai, the two most common tankless brands in the Lower Mainland. For new installations, we offer the Navien NPE-S2 and NPE-A2 (with ComfortFlow recirculation), and the Rinnai SENSEI RX, RXP (with built-in pump), RUS non-condensing, and RUCS condensing. For repairs, we service all tankless brands regardless of manufacturer. Many Surrey homes have Navien or Rinnai units installed during renovations that we see regularly.
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