Rinnai Error 72: Flame Sensing Device Fault
The flame-sensing device is faulty or detecting flame when it should not. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The flame-sensing device is faulty or detecting flame when it should not.
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 72
- Faulty flame sensor
- Cracked sensor insulator
- Wiring/grounding issue
What you can safely check
- Note whether it lights then locks out
- Requires licensed diagnosis
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 72usually 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.
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Parts often behind Rinnai error 72
Genuine Rinnai parts we supply and professionally install — never for DIY.
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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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Backed by the full HVAC resources of CanroHeat.ca and four decades of service in Greater Vancouver since 1985.
Rinnai Error 72 Repair Across Metro Vancouver
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Frequently Asked Questions
Fix Rinnai Error 72 Today
Licensed Rinnai diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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