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Hi Andrew, Just wanted to say a huge thank-you!!! I've just replaced the sensor and have hot water again :) The old sensor gave a reading of 1.8 where the new one was indeed within a hairs breadth of 12. It shows signs of very slight water seepage so I've made sure to clean up the mating...

Thanks for the message Andrew! Any idea if this might be a DIY replaceable part in this boiler type? Many thanks Richard

Hi All, I have a Potterton Promax Combi HE Plus combi boiler. It was fitted when the house was built about 4 years ago and has been fine until this morning. I was only able to get a useable temperature for a shower by turning the shower temp to the max position and even then it was lukewarm...