Why Is Your Water Geyser Not Heating? Top 4 Thermostat and Heating Element Faults

Troubleshooting Cold Water from an Electric Geyser

During cold mornings, a failing water geyser is a major headache. Electric storage geysers are straightforward appliances, and heating failures usually trace back to one of four components:

1. Tripped Safety Thermal Cutout

Every geyser has a manual reset button behind the bottom access panel. If the primary thermostat fails to shut off, the safety cutout trips to prevent tank rupture.

2. Hard Water Scale on the Heating Coil

In areas with high TDS hard water, calcium carbonate coats the copper heating coil. Over 6-12 months, this crust insulates the coil, preventing heat transfer into the water until the element burns out.

3. Faulty Primary Thermostat

If the sensor capillary tube develops a leak, it may falsely signal that the water is already at 65°C, refusing to supply power to the heating element.