I have a pain of a problem with my Baxi 105e. It’s not quite 4 years old, the problem we have is as follows. The heating works fine, and it runs hot water. But when running water, after the initial full flow of the gas it switches off, then realises the demand is there again and switches on full flow, and off again when it should reduce down. The outcome of this is a luke warm bath! Our heating engineer who originally fitted it initially thought it was the divert valve, which is now not the case. Then the flow charts took us to the gas valve, which we changed to no avail, After contacting Baxi they suggested the PCB, which we changed to no avail! It’s now had 3 new parts and we’re now having scratchy head time

Justin, January 2006

Best advice on the web!!! I have baxi 80e that had this problem, and was told it was this or that. As soon as I swapped the sensor wires over- bingo problem solved. But take the lads advice and do not run your boiler like this, just go and get a replacement sensor and the job's a good un. I paid £10 for mine and fitted it myself. Thanks Mike.

Mick, January 2007

it looks like youve spent a fortune on parts there but the first thing you should have checked are the thermistors at arounds 10- 15 pounds each there are two of them and it is best you change both of them you need to drain the cenytral heating system and isolate the cold water to do this ( firstly to check this is the problem tehre are two sensors one directly in the middle of the boiler behind the pcb and the other to the left one has red wires and the other green swap the leads over if your water stays hot this is the problem do not try to run your boiler like this for to long

mike, January 2006