Triangle Tube Error E3: High Boiler Temperature
Boiler temperature reached its high limit (about 210°F), so the control locks out to prevent overheating. Usually a flow or air problem. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
Boiler temperature reached its high limit (about 210°F), so the control locks out to prevent overheating. Usually a flow or air problem.
Triangle Tube fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Triangle Tube error E3
- Circulator pump not running or air-bound
- Low system pressure / air in the system
- Closed valve or stuck zone valve restricting flow
- Faulty supply temperature sensor
- Fouled heat exchanger restricting flow
What you can safely check
- Check the pressure gauge reads about 12-15 psi cold and top up via the fill valve if low
- Make sure zone valves and radiator valves are open
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error E3 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Triangle Tube repair.
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For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.
Parts often behind Triangle Tube error E3
Genuine Triangle Tube parts we supply and professionally install — never for DIY.
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We fit only manufacturer-original (OEM) components so your boiler performs to spec and keeps its factory warranty intact.
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All work is completed by Technical Safety BC–licensed gas fitters (Licence LGA0043870, Boiler Permit LBP0046450). We are fully licensed, bonded and insured for your protection.
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Triangle Tube Error E3 Repair Across Metro Vancouver
Related Triangle Tube Safety & Overheat Codes
Frequently Asked Questions
Fix Triangle Tube Error E3 Today
Licensed Triangle Tube diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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