Eemax Thermal Cycling / Overheat Protection Cycling

Unit frequently shuts off during use and then restarts after a short time; no error code displayed.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Restricted flow causing high outlet temperature, Scale buildup on elements, High-limit thermostat marginal, Inadequate ventilation around unit

Safety: Turn OFF power and allow the unit to cool before servicing.

Stabilization steps:

Clean the inlet filter and ensure all isolation valves are fully open to maximize flow.
Descale the heat exchanger and heating elements to improve heat transfer.
Inspect and, if necessary, replace the high-limit thermostat if it is cycling at lower-than-normal temperatures.
Ensure the unit has adequate clearance from walls and other equipment to dissipate heat.

After service, test with a continuous hot water draw to confirm stable operation.

Medium 3/5

High Limit Thermostat

Check Price on Amazon

We may earn a commission from links on this page.