BoilerFaultCodesYour solar heating system is experiencing a communication error or fault, which may affect how efficiently your water is heated.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: With Vitosolic 100
What causes this fault?
This fault occurs when the main boiler loses its connection with the Vitosolic solar control module, essentially causing a breakdown in communication between the two systems. The most common reason is a loose or damaged data cable, though a malfunction within the solar controller itself can also trigger the alert.
This fault is often more noticeable during the summer months when the household relies more heavily on solar energy rather than gas to heat their water.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 54:1 — no call-out fees, no surprises.
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