how can i fix baxi back boiler?

Faulty thermostat or set too low

Wayne Wilson
January 2019

Does anyone no were i can get a casing for baxi back boiler 401

pete
April 2011

I also need the answer pls

James
December 2008

It could be your thermocouple needs replacing prob the most inexpensive option to try

shelbaby
December 2008

Just had mine fixed. It had the same problem.

The pilot light sensor weakens after a number of years. (It sits permanently in the pilot flame so I guess it's not surprising.) It may function sufficiently to register the pilot flame but the change in draft when the main burners fire can be suffficent to draw the pilot flame away. The boiler 'thinks' the pilot has gone out an shuts down.

You need a new pilot sensor... not expensive in itself but replacement is a job for he gas fitter, I'm afraid.

Metamer
December 2007

Sounds like it could be your water pump!

Gman
November 2007

i too have a similar problem but as i`ve had mine recently serviced and been away for 4 days i switched the water and heating to off .when got back the pilot light is still lit but the back boiler will not fire up, checked the power and thats ok, pump works and thermostat on boiler clicks to say its calling for heat. any thoughts anybody ?

dean humphries
October 2007