BAXI 105e – Faulty hot water sensor flashing light

1 Feb 2007
Reaction score
United Kingdom

I have an intermittent faulty hot water sensor flashing light. Basically the DHW works fine but about 3 times a week it stops working & the faulty hot water sensor light flashes so I turn the boiler off for 10 seconds then back on and the light stops flashing and the DHW works fine again for a few days.

The hot water in the shower occasionally goes luck warm then back to hot.

I replaced the hot water sensor about 3 months ago when I descaled the heat exchanger because the shower was going hot/cold/hot cold.

Is this a faulty hot water sensor or something more? Wondering whether it's the PCB as if it was the sensor then surely this would be a permanent fault?

Has anyone come across this issue?

Sponsored Links
Faulty NTCs can be intermittent and affected by temperature.

I suppose you bought a cheap copy rather than a makers part?

It can also be a connection, wiring loom or the PCB.

Thanks Tony.

I did buy a cheap NTC off ebay so probably best to start with that.

I hope its not the PCB!

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links