Engineers code will not set or unset this system. Only the user code. Only every set up one user code on these systems never set up code two. Think this needs setting up in the settings so it works.
Only way to factory reset this system is by removing the cover and doing the magic part. That’s...
Did you sign anything to say your agreed to the extra work.
Look at the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013:
planning meetings then site visits time to write up certificates. It’s going to be well over grand.
Just out of interest are you doing the plumbing and gas work as well
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