E 29 Medium
Your boiler is struggling because it has lost the connection to the temperature sensor that tells it how warm your home is, which will likely prevent the heating from turning on.
Book a service
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: Room sensor open circuit
Typical repair cost £120-200 (including labour)
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 E 29 — no call-out fees, no surprises.
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Chaffoteaux Minima HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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