Furnace & Boiler Error Codes, Models & Repairs in Coquitlam and the Tri-Cities

Furnace not heating or boiler not working: what to check first

Before requesting a furnace or boiler service visit, collect information that will help us understand the problem. Avoid repeated resets: a disappearing code does not establish that the underlying fault is resolved.

1. Read the thermostat. Confirm it is set to heating and requesting a temperature above the current room temperature. Note a blank screen, battery message or communication warning.
2. Record the display. Photograph the complete error, including prefixes, punctuation and any secondary number. If an LED is visible through a viewing window, record a video of the repeating flash pattern.
3. Identify the equipment. Find the brand, full model number and serial number on an accessible label. Leave sealed panels and burner compartments closed.
4. Describe the symptom. Tell us whether the furnace fan runs, the appliance attempts ignition, all rooms are cold, one heating zone has stopped, or a combi boiler has lost heating, hot water or both.
5. Look for obvious external issues. Check accessible supply and return grilles for blockage. Inspect a user-accessible furnace filter according to the owner’s manual. Report visible water around the appliance or an unusual pressure-gauge reading; do not open hot-water components.

A pressure-switch warning can involve venting, condensate drainage, the inducer, wiring or the switch itself. A high-limit warning may involve airflow or water circulation. A qualified diagnosis should establish the cause before a replacement part is recommended.

Keep safety switches, combustion settings, gas valves and electrical controls intact. Internal testing and repairs belong with qualified tradespeople. If there is a persistent lockout, leak, soot, scorching or unusual ignition noise, request professional service.

Furnace brands and models: identify yours before checking errors

Searching for a brand name alone can bring up a code chart for the wrong furnace. For example, a Ducane 92G1UHE flash chart should not be used as a 97G2 fault chart. Record the entire label, including letters and numbers after the family name.

The model examples above help identify equipment; they are not a promise that every model is currently offered for new installation. Parts, repair suitability and replacement choices are confirmed for your system. Explore our furnace repair services or furnace installation and replacement options.

Furnace error codes: Ducane, Lennox and other major brands

Ducane 92G1UHE red LED flash codes

This chart applies to the 92G1UHE/A93UH1E manual 507867-02, issue 2304, with the listed 103217-03 or 107163-01 controls. Count the flashes between pauses. Heartbeat and rapid continuous operation signals can be normal; an unlit LED can indicate missing power or a control fault.

Source: Allied Air 92G1UHE installation manual, diagnostic tables on printed page 42. Do not apply this chart to a 97G2 controller without confirming its own manual.

Ducane 97G2 furnace errors

If your 97G2 furnace stops heating, include its complete model and the actual display or flash sequence in your request. Ignition, flame sensing, pressure proving, high-limit protection and blower operation require model-specific checks. A 45,000, 70,000 or 90,000-input model label does not establish a shared fault chart.

Find Ducane product literature by exact model or request Ducane furnace service.

Lennox furnace error examples: EL195UHNEK

These examples come from EL195UHNEK installation instructions 508575-01, May 2026. They are a selection, not the full code list. The manual also contains additional electrical and refrigerant-detection-system messages.

Source: Lennox EL195UHNEK manual, printed pages 44–49. Other Lennox furnaces may use different controls and definitions.

American Standard, Trane, YORK, Daikin and Carrier furnace errors

A blink count, an alphanumeric code and a thermostat alert are different ways of reporting operating conditions. Include both the thermostat message and the furnace display when available. For American Standard S9V2, Trane S9V2, YORK TM9V, Daikin DM96VC, Carrier and other brands, use the code legend supplied with that exact equipment.

Common service requests include furnace ignition lockout, furnace pressure-switch faults, furnace high-limit trips, flame-sensor warnings, inducer noise, blower problems and furnace short cycling. A diagnostic appointment can separate the initiating problem from a secondary lockout. Book a furnace diagnostic visit.

Boiler, combi boiler and hydronic heating models

A heating-only boiler supplies a hydronic heating circuit and may heat a separate indirect hot-water tank. A combi boiler also provides domestic hot water through its own hot-water function. These systems can fail differently: working taps do not rule out a heating-zone problem, and warm radiators do not prove that the domestic hot-water side is operating correctly.

Rinnai RX199/RXP199 and Navien NPE-240A2 are tankless water-heater models, so their fault charts must not be substituted for a boiler chart. If your issue is with that equipment, use our hot-water service request form and specify “tankless water heater.”

For hydronic systems, describe the distribution as well as the boiler: radiant floor heating, baseboard heating, radiators, zone valves, circulators, manifolds or an indirect tank. That information helps identify whether the problem is in the appliance, controls or heating loop.

Boiler error codes: Viessmann, Super Hot, IBC, Navien and Rinnai

Viessmann Vitodens 100-W B1HE/B1KE: selected F-codes

For newer Vitodens 100-W B1HE/B1KE equipment, preserve the dot and every digit in the display. These examples are from the North American B1HE/B1KE installation and service instructions.

A code identifies a detected condition; gas supply, ignition, flame sensing and combustion must be evaluated in context. These codes should not be translated into older F4/F9 meanings. Find the exact Viessmann manual and open Viessmann’s model-based fault-code checker.

Earlier Viessmann B1HA/B1KA: fault-code reference

The following condensed reference covers the fault entries in Vitodens 100-W B1HA/B1KA manual 5784 568-22, printed pages 61–62. Short/open means a short circuit or an open/broken connection.

Source: Viessmann B1HA/B1KA installation and service instructions. Use the complete manual for qualifications and technician diagnostics.

Request Viessmann boiler repair if the appliance repeatedly locks out, fails to ignite or stops providing heat. Include the model, code and whether domestic hot water is also affected.

Super Hot Mini-Gas MG: Err codes

This reference summarizes the error entries for MG-50-E through MG-150-E with the S9361A control in Allied’s MG manual. Earlier controls can differ. A STA number is an operating state, not automatically a fault; record whether the display says STA or Err.

Source: Super Hot MG installation and service manual, Table 4, printed page 11. For SG, AAA or another control, use Allied’s model-specific literature.

IBC SL boilers: touchscreen messages and alarms

IBC SL boilers can display descriptive messages instead of a single short number. Save the complete text and the controller’s warning or alarm status. The following messages appear in IBC’s troubleshooting and related model documentation; applicability depends on the boiler and controller.

Sources: IBC SL troubleshooting and controller references, IBC low-pressure guidance and IBC VFC flow-proving documentation. An IBC “Flame Outs” count in a diagnostics screen is a recorded value and does not, by itself, establish an active fault.

Navien and Rinnai boiler error codes

For a Navien NCB-H/NFC-H combi boiler or Rinnai I-Series boiler, use the manufacturer’s model-specific error section. A code taken from a tankless-water-heater page or another generation can send diagnosis in the wrong direction.

• Navien NCB-H manuals and downloads: choose the exact model and open its user-information or installation manual. Use Navien’s product selector for other families.
• Rinnai i120CN documentation: access I-Series user and installation manuals under Documentation; choose the correct product page for another model.

Include leading zeros and any secondary code. Tell us if the fault appears during space heating, a hot-water draw or both. For a combi boiler, also report whether tap temperature fluctuates, one heating zone stays cold or the appliance cycles rapidly. Request Navien or Rinnai boiler service.

Furnace and boiler repair, maintenance or replacement?

The right choice depends on the confirmed fault, heat-exchanger condition, equipment history, parts availability and the rest of the installation. An error code alone is not a reason to replace an appliance. A sound system with an isolated repairable fault can be assessed differently from one with extensive deterioration or repeated major failures.

What a furnace service assessment can include

Depending on the model and agreed work, a technician may inspect the filter and blower, check airflow and temperature rise, evaluate ignition and flame proving, inspect venting and condensate drainage, review safety operation and perform combustion checks. A deep furnace cleaning should have a clear scope; it is not automatically included in every diagnostic or tune-up visit.

Explore furnace maintenance and tune-ups or request furnace repair.

What a boiler service assessment can include

A boiler visit can involve burner and heat-exchanger inspection, condensate components on condensing models, venting, combustion, water pressure, expansion control, circulation, zone operation and visible leaks. Flushing, descaling, magnetic-filter service, air removal, manifold repairs and backflow work should be specified when required. One cold zone may need controls or circulation work even while the boiler itself operates.

Explore boiler maintenance or request a hydronic heating diagnosis.

What should a furnace or boiler installation quote include?

• The proposed equipment’s full model numbers and why the capacity suits the home’s calculated heating needs.
• Relevant ductwork or hydronic piping changes, venting, gas supply, condensate handling, controls and electrical work.
• Permit responsibilities, removal of old equipment, startup checks and commissioning scope.
• Written equipment and workmanship warranty terms, exclusions and any registration responsibilities.
• A clearly itemized price, applicable taxes and the work included in any optional upgrades.

Square footage alone does not establish the correct furnace or boiler size. Insulation, windows, air leakage, design conditions, distribution and domestic hot-water requirements can affect the selection. If you are considering a heat pump with a backup furnace, ask about a properly assessed dual-fuel system. Request a free installation estimate.

Furnace and boiler service in Coquitlam, Port Coquitlam and Port Moody

Choose the page for your city to review local heating services. We confirm appointment timing and the service requirements for your address and equipment when you contact us.

We also serve Metro Vancouver and surrounding communities, including Burnaby, New Westminster, Vancouver, North Vancouver, West Vancouver, Richmond, Surrey, Langley, Maple Ridge, Pitt Meadows and Anmore, with Fraser Valley enquiries welcome. Contact us to confirm service availability for your location.

Why contact Perfect Choice Heating & Cooling?

We offer local heating support, clear written options and a direct way to share equipment details before an appointment. Our website provides links to our FortisBC Trade Ally, HPCN and CleanBC profiles so you can review the credentials relevant to your project. Visit our contact page for those links, current service information and your request form.

Call 778-833-2893, daily 7:00 AM–9:00 PM. Same-day availability is confirmed when you call. Installation estimates are free; any diagnostic, service or repair charges are discussed before booking or approving work.

Furnace and boiler questions homeowners ask

Complete manufacturer fault-code lists and model manuals

For codes outside the tables above, select the exact appliance and manual revision below. A broad guide cannot safely substitute one universal list for every furnace and boiler ever made. The documents supplied with your appliance and any applicable manufacturer updates take priority.

• Ducane: model-specific product literature
• American Standard: owner’s manuals
• American Standard: furnace troubleshooting
• YORK TM9V: manufacturer technical resources
• Daikin DM96VC: product and document reference
• Lennox: manuals and product literature
• Viessmann: current product manuals
• Viessmann: model-based fault-code checker
• Super Hot: MG, SG and AAA literature
• IBC: SL troubleshooting and related references
• Navien: NCB-H manual and product selector
• Rinnai: i120CN manuals and product documentation

Technical descriptions are condensed for homeowners; they are not repair procedures. Product names identify equipment and do not imply manufacturer endorsement or dealer authorization for every brand. Manufacturer references checked October 15, 2026.

Request furnace or boiler service—or get a free installation quote

For a no-heat problem, select a service request and include the model and displayed error. For replacement or a new installation, request a free estimate and share photos of the existing equipment and accessible connections.

Our existing form asks for your first name, phone, city and service needed. You can also add an email, address, availability, equipment photos and project details. For urgent availability, call; online requests are not confirmed appointments.