Drazice heat pump water heater shows H2; unit may run only on electric backup heating.

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

Failed condenser NTC sensor, sensor not properly attached to condenser coil, broken sensor wiring, connector oxidation

Safety: Turn OFF power before removing covers.

Steps:

Locate the condenser coil (usually wrapped around or inside the tank) and find the attached NTC sensor.
Check that the sensor is firmly attached to the coil and has good thermal contact.
Disconnect the sensor from the control board and measure its resistance; compare with the expected value.
Replace the sensor if readings are incorrect or intermittent when the cable is moved.
Clean and reseat the connector on the control board.
Restore power and confirm that H2 is cleared.

Hard 4/5

Condenser NTC Sensor

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