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
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Step 1
A Gas Safe engineer will test the return NTC sensor with a multimeter
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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.