What does the Ariston 50-80 (ll-ll) fault code mean?

Your boiler has lost the ability to measure the temperature of your hot water, so it has safely stopped heating to prevent it from getting too hot.

How much does it cost to fix Ariston error code 50-80 (ll-ll)?

Typical repair cost for the Ariston 50-80 (ll-ll) fault is £120-200 including labour.

D.H.W.thermistor faulty (open cicrcuit)

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Almost always a stuck diverter valve on combis.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.