Baxi combi 105e, pilot keeps going on and off

[Kelly Hillsden]

Hi,

Sorry this is long but i want to give as much details as possible.

I have a Baxi Combi 105e, when i run the hot water the red temp neons get to about 60 then the pilot go of for about 5 water comes through warm then lights up again and gets hot.

Also when running the central heating it does the same thing gets warm then pilot light goes out then occasionally the central heating fault light will flash but only once or twice then the pilot kicks back in again or when heating is on the temp lights go up and down and sometimes the pilot stays off and wont come back on

I have had a new divert valve fitted and a new diaphragm fitted.

When running the hot water you can see the pin going in and out of the diaphragm, also pin which comes out of the top of the diverter manifold comes out, but does not seem to retract straight away when water/heating is not on and sometimes the fan stays on and also come on one its own when not water running or heating.

I have had a look at the central heating sensor and it is not corroded, nor is the safety thermostat sensor.

Any idea what to replace as i was think of just replacing the following:

Central heating sensor
Safety Thermostat
DHW temperature sensor.

Failing that i was looking at getting a new PCB, but if you can give me a cheaper alternative that would be even better.

Any help would be greatly appreciated

Kelly.

 

[Dotty]

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