Follow each step carefully.
Switch off the power supply to the appliance.
Unscrew and remove the access panel to expose the heater.
Carefully disconnect the wires from the old heater.
Unscrew the old heater from its mounting and remove it.
Insert the new heater into the mounting position.
Use a wrench to tighten the securing nut to ensure the heater is firmly in place.
Reconnect the wires to the new heater, ensuring correct polarity.
Reattach the access panel and secure it with screws.
Switch the power supply back on to test the new heater.