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Rick Ridley
Rick Ridley, UK Heating Engineer
Category: UK Plumbing
Satisfied Customers: 1561
Experience:  30 Years on the tools, now retired, Ex CORGI
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My Duo-tec Combi 33HE is not working the Central heating.The

Customer Question

My Duo-tec Combi 33HE is not working the Central heating.The hot water is fine. The thermostats are in correct position.The error code is fluctuating between 26 & 27. Any ideas?
Thanks, ***** *****
Submitted: 1 year ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 1 year ago.

Does the boiler make any attempt to start when you turn up the room stat?

Customer: replied 1 year ago.
Also, the display does not show "E" numbers.The middle sequence of the temperature display figures changes to fluctuating figures between (approx.) 17to 28 -now descending.

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