Indesit washing machine flashing 3 times – error code F03

On certain Indesit washing machines, if the on off light is flashing 3 times, with a slight pause, followed by flashing a further 3 times, or if it is displaying F03 you have an error code that is explained as follows -

NTC fault – check Thermistor and module connections.

The NTC is the thermistor, which is a modern-day thermostat. It’s sometimes inserted into a tube in the heating element between the main live and neutral connections and sometimes it can be a small round stat close by. It is filled with heat sensitive crystals which change their electrical resistance according to their temperature. By knowing what electrical resistance the crystals have at given temperatures the washing machines pcb can tell the exact water temperature.

With this fault the NTC is likely to be either faulty (open/short circuit), or there’s a dodgy connection to or from it, or maybe even a connection problem where it connects to the main PCB.

It’s not something you can easily fault find yourself unfortunately, apart from if there was an obvious broken wire.

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