Ariston MicroGenus A03 error

Joined
22 Mar 2009
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Location
Midlothian
Country
United Kingdom
I have a problem with my MicroGenius II 28 MFFI boiler installed in December 2006.

The boiler shows error code A03 and has to be reset. This can happen several times per week, sometimes several times per day, then it might work for a fortnight or three weeks. We have discovered that we can predict it is about to fail when the hot water is too hot to touch. Ariston approved engineers have replaced the circuit board twice, some sensor or something and it's still happening. Thank goodness I took out the extended warranty!

I have had to reset it 4 times between 09:00 and 15:30 today and it is becoming very frustrating! Any advice would be gratefully appreciated.
 
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has anybody checked the pump, sounds like its on its way out
 

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