Noritz Boiler: Tripping the breaker
A Noritz boiler that trips its breaker or RCD has an electrical fault — a short, a failing component drawing too much current, or a moisture / grounding problem. This needs a technician; repeatedly re-arming a tripping breaker is unsafe.
A Noritz boiler that trips its breaker or RCD has an electrical fault — a short, a failing component drawing too much current, or a moisture / grounding problem. This needs a technician; repeatedly re-arming a tripping breaker is unsafe. On Noritz boilers, this is linked to 1 fault code (73). 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
- Boiler unresponsive or erratic
- Multiple unrelated faults at once
- Display errors that persist after reset
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.
- 1Do not keep re-arming a breaker that trips immediately
- 2Check for any water leaking onto the boiler’s electrics
- 3Note whether it trips at rest or only when the boiler fires
- 4Call a licensed technician — electrical faults inside the boiler are not DIY
Related Noritz fault code
These Noritz codes are commonly behind “tripping the breaker”. Tap any code for its full meaning, causes and fix.
What our licensed technicians do
- Rule out sensors, wiring, power and grounding first
- Check board fuses, relays and output signals
- Confirm correct firmware/dip-switch and model configuration
- Replace and re-commission the board, then verify all functions
Noritz tripping the breaker — FAQ
Why does my Noritz boiler keep tripping the breaker?
A Noritz boiler that trips its breaker or RCD has an electrical fault — a short, a failing component drawing too much current, or a moisture / grounding problem. This needs a technician; repeatedly re-arming a tripping breaker is unsafe. The related Noritz fault code is 73. A licensed technician confirms the true root cause with the right instruments before any repair.
Is it safe to keep resetting my Noritz boiler when it shows "tripping the breaker"?
Reset it at most once. If "tripping the breaker" 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 Noritz boiler with this problem in Greater Vancouver?
Yes. Our Red Seal–certified, TSBC gas-licensed technicians diagnose and repair Noritz NCC combi and condensing 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.
“Tripping the breaker” on other boiler brands
Noritz boiler tripping the breaker? We can help today.
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