Triangle Tube boiler Error Code E15 — Meaning & Repair in Greater Vancouver
If your Triangle Tube boiler is displaying error code E15 (Sensor Drift), it means the boiler’s supply or return temperature sensor reading has drifted outside expected limits, so the control module locked out because it can no longer trust the temperature data it relies on. On Triangle Tube’s Prestige Solo and Excellence boilers, E15 is documented as a hard / manual reset lockout, and it is worth understanding clearly before anything else is done.
What Triangle Tube Code E15 Means
According to Triangle Tube’s own documentation, code E15 (Sensor Drift) means the supply or return sensor reading has drifted. When the boiler’s control module detects this condition, it stops the boiler and shows the E15 reference on the display so the fault can be identified. The display also stores the event in the boiler’s lockout history, which means a technician can retrieve the recent fault record even after the boiler has cycled or attempted a restart.
That stored history matters. A single code is a snapshot of one moment; the sequence and frequency of codes tells the real story of what your boiler has been doing over time. Reading that history correctly is often the difference between fixing the actual fault and replacing a part that was never the problem.
| Detail | Information |
|---|---|
| Code | E15 — Sensor Drift |
| Documented meaning | The supply or return sensor reading has drifted. |
| Lockout type | Hard / manual reset lockout |
| Classification | Control / sensor lockout |
| Recommended action | Leave the boiler off; call ROMA at (604) 704-0300 |
What Typically Causes Code E15
On Triangle Tube boilers, code E15 is most often associated with the conditions below. This list is informational only — pinpointing which one applies to your specific boiler requires test instruments and gas-licensed training, and is not something to attempt yourself.
- A degraded or out-of-calibration supply or return temperature sensor
- Poor sensor contact with the pipe or fitting
- Wiring or connector resistance affecting the sensor reading
- Low flow conditions distorting the temperature relationship
Is Triangle Tube Code E15 a Safety Concern?
E15 is primarily a control-accuracy fault rather than an immediate combustion hazard, but it does take the boiler out of service and accurate sensors are part of safe operation. It should be diagnosed promptly by a qualified technician.
How ROMA Repairs It
ROMA Heating & Cooling has serviced high-efficiency condensing boilers across Greater Vancouver since 1999. When you call us about a Triangle Tube code E15, our gas-licensed technician follows a methodical diagnostic process rather than swapping parts at random:
- Test the supply and return temperature sensors against Triangle Tube resistance specifications
- Inspect sensor mounting and electrical connections
- Verify system flow is correct
- Replace any out-of-specification sensor with a genuine OEM part and re-test
Every repair is performed by an insured, gas-ticketed technician, uses genuine Triangle Tube OEM parts where replacement is required, and is verified with the appropriate operational and combustion checks before we leave. That protects both your warranty and your home.
Why Code E15 Calls for a Licensed Technician
It can be tempting to look up a boiler code and hope it is something simple. The difficulty is that the same Triangle Tube code can stem from more than one underlying fault, and on a gas appliance several of those faults sit directly on the gas, flame, water, or venting side of the equipment. Correctly separating a minor cause from a serious one takes proper instruments, manufacturer specifications, and the legal gas certification to work on the appliance safely. In British Columbia, work on natural gas equipment is regulated for good reason — a misdiagnosis around combustion or venting can put your household at risk. A licensed ROMA technician removes that guesswork and stands behind the diagnosis.
Triangle Tube boilers are well-built, and many of these faults are entirely repairable once the true cause is identified. The goal of professional service is not just to clear code E15 today, but to make sure the same fault does not return next week — and to confirm the boiler is operating safely and efficiently through a Greater Vancouver winter.
Same-Day Emergency Triangle Tube Boiler Service Across Metro Vancouver
A boiler locked out on code E15 can leave your home or building without heat or hot water quickly — and in the damp, cold stretches of a Lower Mainland winter, that is more than an inconvenience. ROMA offers same-day emergency Triangle Tube boiler diagnosis and repair throughout Metro Vancouver — including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, Port Coquitlam, Port Moody, New Westminster, North Vancouver, West Vancouver, Delta, Langley, and Maple Ridge. Our gas-licensed, insured technicians arrive equipped to read the code properly, diagnose the root cause, and restore safe, reliable heat. Call our team at (604) 704-0300 and we will get your Triangle Tube boiler properly diagnosed and safely back in service.
What Our Customers Say
“We had a 12-year-old Navien combi hot water heater and boiler that started to have error messages, E001. Roma arranged service and sorted it out.”
— Alan Info, Google review (★★★★★)
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— Ed S, Google review (★★★★★)
Frequently Asked Questions
What does Triangle Tube boiler code E15 mean?
Code E15 is the Sensor Drift fault. Per Triangle Tube’s documentation it means the supply or return sensor reading has drifted. The control module locks the boiler out and displays E15 until the fault is diagnosed and corrected.
What causes a Triangle Tube code E15?
Common causes include a degraded or out-of-calibration supply or return temperature sensor and poor sensor contact with the pipe or fitting, among others. Identifying the exact cause on your boiler requires a gas-licensed technician with the proper test instruments.
Is Triangle Tube code E15 dangerous?
It is a fault that stops the boiler and points to a control or sensor problem. While it is not an immediate combustion hazard on its own, it should be diagnosed by a qualified technician and not ignored.
Can a Triangle Tube code E15 be repaired?
Yes. Once a licensed technician confirms the true cause, code E15 is typically repairable using genuine Triangle Tube parts. ROMA diagnoses the root cause and verifies safe operation before returning the boiler to service.
Who should I call for a Triangle Tube code E15 in Vancouver?
Call ROMA Heating & Cooling at (604) 704-0300 for same-day emergency diagnosis. Triangle Tube boiler faults should be handled by a gas-licensed technician, not reset repeatedly.
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For fast, professional diagnosis and repair anywhere in Greater Vancouver, call (604) 704-0300 or email info@romaheating.ca. Same-day and after-hours service, gas-licensed and insured, serving the Lower Mainland since 1999.
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