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James, Handyman
Category: Appliance
Satisfied Customers: 6904
Experience:  I have repaired and maintained numerous items over the years, from fridges to freezers, radios to TV's.
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Back duo tec combo makes a banging noise when firing up

Customer Question

Hi back duo tec combo makes a banging noise when firing up cheers Tom
JA: What's the brand and model of your appliance? How old is it?
Customer: Brand new back duo tec 40 combi
JA: How long has this been going on? What have you tried so far?
Customer: taken out electrodes to check gap seem ok
JA: Anything else we should know to help you best?
Customer: no not really
Submitted: 15 days ago.
Category: Appliance
Expert:  James replied 15 days ago.

Hello and welcome to JustAnswer!
This is James, I'm an appliance repair technician with over 10 years of experience, and I'll be assisting you today

Sorry to hear your appliance is having issues, please stand by while I find the answer for you, this is not an immediate service however I will try and respond as soon as possible.
What readings are you getting from the gas analyser?

Expert:  James replied 15 days ago.

Without the information requested I can only provide generic advice at this stage, but happy to elaborate once you provide the addition info.
For now I hope you may find this initial guidance useful.

The banging noise could be a range of causes, the most common is the fan or pump being lose and needing re-securing, as this is a gas appliance it will need a gas safe engineer to attend and re-secure the components.