Symptoms
- Breaker flips off when the water heater is heating
- May trip shortly after resetting
- No other appliance on that circuit since it's usually dedicated
- May coincide with reduced or no hot water
Likely causes
- CommonShorted heating elementA failed element can short internally and draw excess current, tripping the breaker.
- CommonDamaged or corroded wiring at the element or thermostatWater intrusion or loose connections can cause a short.
- PossibleWorn-out breaker no longer holding its rated loadBreakers can weaken with age and trip below their actual rating.
- PossibleGrounded (shorted to the tank) element or wiringA fault where current leaks to the tank's metal body will trip the breaker quickly.
What to do
- Turn off the breaker and leave it off; don't repeatedly reset a breaker that trips instantly.
- If comfortable and the breaker is confirmed off, remove the access panels to visually inspect the wiring and elements for scorch marks or corrosion.
- Do not touch any wiring or elements without confirming with a multimeter that power is fully off.
- If you have a multimeter and know how to use it safely, elements can be tested for a short to the tank (continuity to ground) or resistance out of range.
- If unsure, leave the panels closed and power off, and treat this as needing a professional.
- Note whether the trip happens instantly on power-up (suggesting a hard short) versus after a period of running (suggesting overheating).
Tools and parts
- Multimeter (optional, for those comfortable testing)
- Screwdriver
Water heater heating elementSearch: “electric water heater heating element replacement”
When to call a pro
If the breaker trips instantly or repeatedly, call an electrician or water heater technician rather than continuing to reset it.
Safety
Use caution
Never work inside the water heater's electrical compartment without confirming the breaker is off and, ideally, testing with a voltage tester first.