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tested the overheat stat by heating it up with a controlled heat source and it clicks and goes open - so fairly sure that is working as intended. I'm fairly sure the other 2 thermistors are fine too - so guessing the problem lies elsewhere... We had the main diverter valve and pump changed...

Ok so moving on to the DHT thermistor 3k ohms and some change and the same for the one above the Overheat Stat Are they both in spec? Seems a little low to me - measured in circuit Edit - system may still be quite warm so I'll measure them again in an hour or 2... I guess if they are both...

So the overheat stat is ok and the problem is elsewhere?

My old Baxi 105e keeps going into overheat cutoff mode and I am fairly sure the Overheat Stat is to blame... Can someone confirm what the expected Ohms reading is for the 7671968 part please? https://www.cityplumbing.co.uk/p/baxi-potterton-overheat-thermostat-7671968/p/215649 I am getting a...

So am I right in thinking the issue is the minimum load of 20vA not being met so the transformers won't wake up. What's to stop me wiring the LED MR16 bulbs in parallel? Dimmer in the bathroom... because I don't like feeling like I'm on an operating table with 8 spot lights beaming down when...

Are you sure that's right? I've seen several lighting websites say that they will work with led MR16 bulbs that ate designed to run off AC. They also say to use the equivalent wattage rather than actual when matching them to the transformer vA rating. I'm not keen to convert to 230v as this is...

Hiya, after some advice. I'm in the process of getting rid of the halogen lighting in our house (17 x 50 watt bulbs out of the kitchen!) Next on my hit list is the bathroom. It has 8 x 50w 12v lamps on independent transformers. I've uploaded some pics of the transformers but they are 20-60vA...