Rinnai Error 16: Over-Temperature Warning
The unit detected an over-temperature condition and limited or stopped operation to protect itself. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The unit detected an over-temperature condition and limited or stopped operation to protect itself.
Rinnai fault codes can vary slightly 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 Rinnai error 16
- Scale build-up reducing heat transfer
- Low flow rate
- Faulty temperature sensor
- Restricted heat exchanger
What you can safely check
- Note whether hot-water flow is reduced
- Avoid running the unit if it keeps tripping
- Hard-water homes are prone to scale
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 16usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Rinnai repair.
Parts Are Professionally Installed — Not Sold for DIY
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 Rinnai error 16
Genuine Rinnai parts we supply and professionally install — never for DIY.
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Every repair and installation is backed by genuine parts, licensed workmanship, and a promise to make it right.
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Every repair and installation is backed by our written workmanship guarantee. If a part we installed fails because of our work, we make it right.
Genuine OEM Parts
We fit only manufacturer-original (OEM) components so your boiler performs to spec and keeps its factory warranty intact.
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As an authorised service provider for the brands we work on, our installs preserve and register your manufacturer parts warranty.
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All work is completed by Technical Safety BC–licensed gas fitters. We are fully licensed, bonded and insured for your protection.
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Backed by the full HVAC resources of CanroHeat.ca and four decades of service in Greater Vancouver since 1985.
Rinnai Error 16 Repair Across Metro Vancouver
Frequently Asked Questions
Fix Rinnai Error 16 Today
Licensed Rinnai diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
A Division of CanroHeat.ca · Licensed Gas Fitters · Serving Greater Vancouver since 1985