Triangle Tube Indirect Tank Fault: Indirect / DHW Sensor Fault
What the Triangle Tube Indirect Tank Fault fault means, what causes it, and why it's a job for a licensed BC gas technician — not a DIY reset.
Severity
Moderate — book a service visit
What the Triangle Tube Indirect Tank Fault fault means
The Prestige works as a system with a Smart indirect tank; a sensor or priority fault between them can leave you with heat but no hot water (or vice versa).
On Triangle Tube Prestige Solo and Prestige Excellence stainless condensing boilers, Indirect Tank Fault is a hot-water (dhw) fault. It is a protective response — the boiler is telling you something needs attention, and the safe, lasting fix is a proper diagnosis rather than repeated resets.
Symptoms you may notice
- Heating works but no/low domestic hot water
- Hot water runs lukewarm or fluctuates
- Fault only on hot-water demand
Common causes of Triangle Tube Indirect Tank Fault
Why this is not a DIY fix
DHW faults (flow sensor, DHW thermistor, plate heat exchanger or diverter valve) need flow and temperature testing to pinpoint. A technician confirms whether it is a sensor, a scaled plate exchanger, or a stuck diverter before replacing parts.
In British Columbia, gas work must be performed by a TSBC-licensed gas fitter. GasBoilers.ca — a CanroHeat division — sends Red Seal–certified, gas-licensed technicians who diagnose the true cause, repair it correctly, and verify safe operation before they leave.
How our technicians diagnose & repair it
- 1Test the DHW flow sensor and thermistor
- 2Inspect the plate heat exchanger for scale (common in hard-water areas)
- 3Check the diverter valve operation
- 4Descale or replace the affected component and verify DHW output
Related Triangle Tube codes
Triangle Tube Indirect Tank Fault — FAQ
What does the Triangle Tube Indirect Tank Fault fault mean?
The Prestige works as a system with a Smart indirect tank; a sensor or priority fault between them can leave you with heat but no hot water (or vice versa). On Triangle Tube Prestige Solo and Prestige Excellence stainless condensing boilers, this is categorised as a hot-water (dhw) fault.
What causes Triangle Tube Indirect Tank Fault?
The most common causes are: Smart indirect tank sensor or aquastat fault; DHW priority wiring issue; Indirect circulator fault. A licensed technician confirms which one applies before any part is replaced.
Can I fix Triangle Tube Indirect Tank Fault myself?
No. DHW faults (flow sensor, DHW thermistor, plate heat exchanger or diverter valve) need flow and temperature testing to pinpoint. A technician confirms whether it is a sensor, a scaled plate exchanger, or a stuck diverter before replacing parts. Repeatedly resetting the boiler without fixing the root cause can be unsafe and can cause further damage. Call GasBoilers.ca at 604-359-1081 for a licensed diagnosis.
Is the Triangle Tube Indirect Tank Fault fault dangerous?
This is a protective fault — the boiler has shut down a function to protect itself. It is best diagnosed promptly by a licensed technician so the underlying cause does not lead to a more expensive failure.
How much does it cost to fix Triangle Tube Indirect Tank Fault in Greater Vancouver?
Cost depends on the root cause and any parts needed. We start with a flat-rate diagnostic, then quote the repair before any work begins — no surprises. Call 604-359-1081 for current pricing and same-day availability.
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