Safety first: Turn OFF power at the breaker and verify with a non-contact voltage tester before opening any covers.

Step 1 – Check breaker: Inspect the electrical panel and reset any tripped double-pole breaker feeding the Ruud heater.
Step 2 – Access upper thermostat: Remove the upper access panel and insulation. Press the red reset button (ECO) on the upper thermostat firmly until it clicks.
Step 3 – Inspect wiring: Check wire connections at the heater junction box and thermostat terminals for looseness or burning. Tighten as needed.
Step 4 – Test operation: Restore power and wait 1–2 hours. If hot water returns but the ECO trips again, a thermostat or element may be faulty.
Step 5 – Replace upper thermostat: With power OFF, label and move wires from the old thermostat to a new OEM Ruud-compatible thermostat one at a time. Secure it against the tank and reinstall insulation and cover.

If breakers continue to trip, contact an electrician or technician to check for wiring or element shorts.

Ruud electric water heater has no hot water at all; power light off, no heating.

Possible Causes