Noritz No Power to Water Heater

No hot water anywhere in the home; Noritz water heater display is blank (no power).

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Tripped circuit breaker, Blown internal fuse on Noritz PCB, Loose power connection at terminal block, Faulty power supply or GFCI outlet

How to Fix / Troubleshooting

Safety first: Turn OFF the breaker before opening any electrical covers. If you are not comfortable working with electricity, contact a qualified electrician or technician.

Steps to check and correct:

  • Check breaker: Locate the dedicated breaker for the Noritz heater in your electrical panel. Reset if tripped. If it trips again immediately, stop and call a professional.
  • Verify outlet (if corded): If your Noritz plugs into an outlet, test the outlet with another device. Reset any tripped GFCI.
  • Inspect power terminal: With breaker OFF, remove the front cover and check the power terminal block for loose wires. Tighten screws if needed.
  • Internal fuse: Some Noritz models have an internal fuse on the PCB. If accessible and visibly blown, it should be replaced with the exact type by a technician after determining the cause.
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Repair Difficulty

Medium 3/5
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