Rinnai Boiler: Leaking water
Water around a Rinnai boiler can be a discharging pressure-relief valve (overpressure), a blocked or split condensate line, or a failing seal, fitting or heat exchanger. Water on live electrics or a hot heat exchanger is a safety issue.
Water around a Rinnai boiler can be a discharging pressure-relief valve (overpressure), a blocked or split condensate line, or a failing seal, fitting or heat exchanger. Water on live electrics or a hot heat exchanger is a safety issue. On Rinnai boilers, this is linked to 4 fault codes (25, 29, 65, LC). Below are the likely causes, the safe checks you can make, and exactly what our licensed BC gas technicians do — because boiler repair in British Columbia is licensed gas work, not a DIY job.
Boiler repair is licensed gas work in BC. The checks below are the safe limit of DIY. Do not open the boiler or work on gas, combustion or safety controls — read the fault code, reset at most once, and call a licensed technician if it returns.
What you might notice
- Lockout, often after very cold weather
- Water pooling near the boiler
- Gurgling sounds from the trap
- No or weak heat
- Overheat or flow faults under load
- Pump running but rooms stay cold
Safe checks you can make first
These are the only steps a homeowner should take. If they don’t resolve it, stop — the rest is licensed gas work.
- 1Identify where the water comes from — top, bottom, condensate pipe, or a fitting
- 2Check pressure: above ~30 psi suggests an expansion-tank / PRV fault
- 3Place a container to catch water and protect the floor
- 4Always call — do not run a leaking boiler near electrical components
Related Rinnai fault codes
These Rinnai codes are commonly behind “leaking water”. Tap any code for its full meaning, causes and fix.
What our licensed technicians do
- Clear and clean the condensate trap and drain line
- Check for frozen, sagging or improperly sloped runs
- Verify the neutraliser (where fitted) is not exhausted
- Re-route or add freeze protection to prevent recurrence
- Test circulator-pump operation and speed
- Purge trapped air and check for air-bound zones
Rinnai leaking water — FAQ
Why is my Rinnai boiler leaking water?
Water around a Rinnai boiler can be a discharging pressure-relief valve (overpressure), a blocked or split condensate line, or a failing seal, fitting or heat exchanger. Water on live electrics or a hot heat exchanger is a safety issue. The related Rinnai fault codes are 25, 29, 65, LC. A licensed technician confirms the true root cause with the right instruments before any repair.
Is it safe to keep resetting my Rinnai boiler when it shows "leaking water"?
Reset it at most once. If "leaking water" returns, the boiler is telling you there is a real fault that needs diagnosing — continuing to reset it can make things worse. Call GasBoilers.ca at 604-359-1081 and a licensed technician will find the cause.
Can you repair a Rinnai boiler with this problem in Greater Vancouver?
Yes. Our Red Seal–certified, TSBC gas-licensed technicians diagnose and repair Rinnai i-Series, M-Series and Q-Series across Vancouver, Burnaby, Surrey, Richmond, the Tri-Cities and the rest of Greater Vancouver. Same-day appointments are often available — call 604-359-1081.
“Leaking water” on other boiler brands
Rinnai boiler leaking water? We can help today.
Licensed, Red Seal–certified gas technicians across Greater Vancouver. Upfront pricing, same-day service available.