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203 FAULT CODE
Ariston

Return Temperature Sensor Fault

Medium Severity Engineer Required

The return NTC temperature sensor has an open circuit or is giving incorrect readings.

Step-by-Step Fix Guide

  1. Step 1

    A Gas Safe engineer will test the return NTC sensor with a multimeter

  2. Step 2 Engineer only

    The sensor may need replacing

Gas Safe Reminder

Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.

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