Baxi Boiler Warranties


Novice Member
Hello All

I intend to fit a new Baxi 836 with a 10 year Warranty. However, since learning about issues with possible sludge build up in existing plastic pipes I am concerned that Baxi might find that a convenient excuse to renege on the Warranty. Blaming another part of the Heating system as a cause for their a Boiler to fail. I spoke to Baxi and they said they expect to see evidence of the correct cleaning/flushing procedure and chemical treatment used by the Boiler installer on the existing Pipework and Radiators (14 years old) plus a Filter fitted. The Benchmark booklet should be filled out correctly reflecting this and the Boiler registered with them within 30 Days.
Which all seems perfectly acceptable. However, I would still like to know if anyone has come up against obstacles and issues getting Baxi to repair a Boiler regardless of correct procedures being followed when still in Warranty. Or if customers have been happy with their service?


Outstanding Member
When I had my radiators updated the plumber installed one of these:
Magnaclean Professional 2
Is this the kind of filter you are talking about? The sludge comes from the radiators BTW hence the dirty great magnet in it.
You can clean it every year yourself.


Prominent Member
I had a baxi heat only boiler fitted in 2017. One year later it failed, around a week after its first service. I don't even recall showing the service record to the engineer, I think they just accepted what I had said over the phone.


Outstanding Member
The first year there was a lot of sludge from the new radiators so they definitely work.

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