These two parts were very small it was well made, with excellent packaged. When fitting follow instruction and isolate electrical feed before fitting the part. Make sure you clean before fitting onto the boiler before connecting back. The part is factory make made and tested, so don't have doubts. It works perfect if all the other parts are checked and functioning properly. Main thing is to check the circuit board work perfectly, then these two parts will work. I had not problem with these two parts, but the circuit was faulty, and I replace that and the whole system started to work.
Verified purchase: Yes | Condition: New
A perfect service in every way
Verified purchase: Yes | Condition: New
Fixed the problem of not switching off on Potterton Suprema 40, easy to fit only a 17mm spanner for the over temperature sensor needed, and a Philips screwdriver for cover.
Verified purchase: Yes | Condition: New
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