How to Fix / Troubleshooting

Safety: Turn OFF power before accessing electrical components.

Steps:

Check the thermostat setting and ensure it is not set too low or too high.
On mechanical models, replace the thermostat if it switches on/off erratically or has burnt contacts.
Inspect the thermostatic mixing valve; clean or replace it if it fails to maintain a stable outlet temperature.
On electronic models, verify that the main NTC sensor is firmly seated in its well and that wiring is intact.
Test the heating element for intermittent operation by monitoring current draw during a heating cycle; replace the flange assembly if the element cuts out unpredictably.

Water temperature fluctuates significantly during a shower; Drazice heater cycles between hot and lukewarm.

Possible Causes