Triangle Tube Error E37: Low Water Pressure
System water pressure has fallen below 7.2 psi, so the boiler blocks firing until pressure is restored. (Often shown to homeowners as a low-water/E57 warning.) We diagnose and repair it across Greater Vancouver — same-day and after-hours.
System water pressure has fallen below 7.2 psi, so the boiler blocks firing until pressure is restored. (Often shown to homeowners as a low-water/E57 warning.)
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 E37
- System lost water through a leak or weeping relief valve
- Waterlogged or failed expansion tank
- System not refilled after service or air bleeding
- Faulty fill/auto-feed valve
- Water pressure sensor reading low
What you can safely check
- Check the pressure gauge; if below ~12 psi, slowly add water via the fill valve to 12-15 psi cold
- Look for obvious water around the boiler or relief valve discharge and report any leak
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 E37 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 E37
Genuine Triangle Tube parts we supply and professionally install — never for DIY.
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Triangle Tube Error E37 Repair Across Metro Vancouver
Frequently Asked Questions
Fix Triangle Tube Error E37 Today
Licensed Triangle Tube diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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