Ravenheat CSI 120 Combi Boiler 04 Fault Code


Postby drsmith91 » Sat Oct 03, 2015 5:05 pm

I have a ravenheat csi120 combi boiler. 04 fault comes on only when the shower is used . Water goes cold after a few minutes in the shower .When the bath is used no fault happens . Any ideas as to what is wrong. Thanks in advance.
Dave
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