HTP Error Er:16: Operating Over-Temperature
The operating temperature sensor measured boiler water above roughly 203 F (95 C), so the unit shut down on high temperature to protect itself. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The operating temperature sensor measured boiler water above roughly 203 F (95 C), so the unit shut down on high temperature to protect itself.
HTP 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 HTP error Er:16
- Insufficient water flow through the boiler
- Air-bound system or stuck circulator pump
- Closed zone/isolation valve restricting flow
- Faulty or drifting operating temperature sensor
- Clogged system filter or strainer
What you can safely check
- Check the system pressure gauge reads in the normal range (typically around 12-25 psi)
- Listen for the circulator pump running and confirm radiators/zones are not all shut off
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 Er:16 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 HTP 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 HTP error Er:16
Genuine HTP parts we supply and professionally install — never for DIY.
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HTP Error Er:16 Repair Across Metro Vancouver
Related HTP Safety & Overheat Codes
Frequently Asked Questions
Fix HTP Error Er:16 Today
Licensed HTP diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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