Medium
d.60 on Vaillant Home System

Your boiler is recording how many times it has been forced to shut down because it grew dangerously hot, which usually points to a circulation or sensor issue.

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Number of blocks by the temperature limiter: Current value

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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