← All fault simulators
Residential · Fault simulator

No hot water: electric storage HWS

REVIEW COPY. Every reading and explanation is a placeholder until Jordan checks it. The reviewer table at the bottom lists them all for each fault.
Customer report
No hot water since yesterday. The breaker for the hot water in the switchboard is on.
Circuit
Single-phase 3.6 kW (240 V rated) electric storage hot water system on its own circuit, with a local isolator. The thermostat and over-temperature cutout switch the active to the element. The water is cold, so the thermostat should be calling for heat.
Your job
Find the fault with the fewest tests, working safely. The fault is different each time. Every test costs 2 points, unsafe steps cost more.

Circuit

AN Isolator Thermostat Over-tempcutout Element3.6 kW 240 V

Safety actions

Live tests are done energised with insulated probes and the right PPE. Dead tests need the circuit isolated, locked, tagged and proved dead.

Choose a test

Meter · ready

Score

100

    Call the fault

    Reviewer table

    Pick a fault to see every reading the simulator shows for it. Chapter reference: [Jordan to add Bible chapter]

    TestConditionReadingWhat it tells you