No hot water (electric water heater)

visibilityHow to check and reset

1. Turn the water heater's breaker off at the panel first — the ECO lives on the upper thermostat, with 240-volt terminals right beside it.
2. Remove the upper access panel (one or two screws) and fold the insulation back. Leave the clear plastic terminal shield in place — everything you need is in front of it.
3. The high-limit reset is the red button above the thermostat dial. If it has tripped, pressing it firmly gives a definite click. No click usually means it never tripped — look elsewhere.
4. Refit the insulation and panel, turn the breaker back on, and give the tank a couple of hours to heat.

handymanHow to fix it

The reset is the fix — press until it clicks, close up, restore power, and give it a couple of hours. But treat a second trip as a diagnosis, not bad luck: a thermostat stuck on is the usual reason the water overheated, and that's the part to test or replace next.

visibilityHow to recognize it

1. Read the pattern: water that's warm but never hot, or hot for one short shower then lukewarm, points low — the lower element does most of the day-to-day heating, and it's the one sediment buries.
2. Listen while the tank heats: rumbling, popping, or kettle-like knocking is water flashing to steam underneath a sediment blanket.
3. Factor in age and water: eight-plus years on hard water makes sediment the default suspect. If the tank has never been flushed, assume there's a pile down there.

handymanHow to fix it — flush the tank

Power off, cold inlet closed, tank drained through a hose, then the cold inlet opened in short bursts to stir the pile and push it out until the water runs clear. If the lower element already burned out under the sediment, replacing it is the same job as the upper element — same parts, same 240-volt rule, same gates.

1. Turn off the breaker. Close the cold-water inlet valve on top of the tank.
2. Connect a garden hose to the drain valve, run it to a floor drain or outside, and open a hot tap somewhere in the house.
3. Open the drain valve and let the tank empty. Expect cloudy water and grit near the end — that's the point.
4. Stir the pile: with the drain still open, open the cold inlet in short bursts. Repeat until the hose runs clear.
5. Close the drain, refill completely — steady, sputter-free stream at a hot tap — and only then restore the breaker.

visibilityHow to check

1. Turn off the breaker — then prove it. With the upper access panel off and the insulation folded back, test both element screw terminals with the multimeter on volts (or a non-contact tester first): you must read zero before your fingers go anywhere near the terminals.
2. Disconnect one wire from the element. Set the meter to ohms and read across the two element screws: the decisive result is open versus not — an open reading (OL, no movement) means the element has burned out. A healthy element reads roughly 12–20 ohms depending on its wattage (higher wattage reads lower: about 13 ohms for a 4500 W element, closer to 19 for a 3000 W).
3. Now test each screw to the tank's bare metal. Any continuity there means the element is shorted to ground — that's the failure that trips breakers. Either result means replacement.

handymanHow to fix it

Drain the tank, unscrew the old element with an element wrench, thread in an exact match (same voltage and wattage, new gasket), refill completely before restoring power, and watch for drips. Note: who may legally do this varies by province — see the note for your region.

1. Breaker off, and verified off at the terminals (see the check above). Close the cold-water inlet valve on top of the tank.
2. Attach a garden hose to the drain valve and drain the tank — open a hot tap somewhere in the house to break the vacuum. For the upper element you only need the level below the element; when in doubt, drain it all.
3. Remove the two wires, unscrew the element counter-clockwise with the element wrench, and pull it out with its gasket.
4. Match the replacement exactly — voltage (240 V), wattage, and the screw-in thread, all printed on the old element's face — fit the new gasket, and snug it in clockwise.
5. Refill the tank completely before the breaker goes back on: run a hot tap until it flows in a steady, sputter-free stream. An element energized in air destroys itself in seconds.
6. Reconnect the wires, restore power, and check around the element for drips over the next hour.

visibilityHow to check

1. Same hard rule as the element test: breaker off, then proven off at the terminals before anything else. The panels are already open if you've just tested the elements — do this check in the same session.
2. Behaviour first: an ECO that keeps tripping points to a thermostat stuck on. A tank that never heats at all, with both elements testing healthy, points to one stuck off.
3. Meter test, power off: check continuity through the thermostat contacts with the dial turned to its lowest setting, then its highest. Readings that never change as the dial crosses the water's actual temperature point to a failed thermostat.
4. Honesty note: this is the least conclusive check on the page. Many pros simply replace a suspect thermostat — the part costs about as much as the time spent proving it.

handymanHow to fix it

Thermostats clip into a spring bracket against the tank — no draining needed. Swap the suspect one for an exact match (upper and lower are different parts), move the wires across one at a time, and set the dial to 60 °C. The same provincial rules as the element swap apply — see the note for your region.

1. Breaker off and verified off. Photograph the wiring before touching a single wire.
2. Pop the old thermostat out of its spring bracket. Note how it sat: the new one must press flat against bare tank metal to read the temperature.
3. Fit the exact replacement — upper thermostats include the ECO reset, lowers don't; they are different parts — and move the wires across one at a time, matching your photo.
4. Set the dial to 60 °C (the standard Canadian storage temperature), refit the insulation and panel, and restore power.