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Suddenly our ECOPlus 837 has stopped heating the radiators and hot water. It sounds like everything is working however there is no flame indicator. I have reset it numerous time however it's still not working. Pressing the i button it gives me a code of S.42 Is there anything I can try...

Sorted the Fan symbol issue, turns out that it's the Heat/Cooling setting. To put the CM927 back to Heat mode it just needed the temp +&- buttons held down for 5 seconds. Thought I would post this just in case it helps anyone else out :)

I tried one last thing which was to reset the CM927 to factory settings and now I keep getting a Fan symbol just above the time on the LCD and I can't find anywhere that tells me what this is. Any chance you might know?

Will email them for sure. I did change the batteries and yes if we press the override button the heating works, we just have to control the temperature via the boiler itself, so at least we have heat for now.

Well I connected A & B as you suggested and the boiler fired up straight away, I repeated this several times just to make sure. So it looks like the BDR91 is at fault. Thanks for your help.

Thanks for the quick reply, looking at the BDR91 unit to link A & B do I take the wire out of B & connect it to C? Also the Green light on the BDR91 is permanently on no matter what we change the temperature to on the CM927. If we take the batteries out after an hour or so the BDR91 flashes...

Hi, We have had the CM927/BDR91 running fine with our Vaillant ecoTEC Plus 837 boiler since newly fitted 3 years ago. For some reason over the last couple of months we have noticed that the boiler is not switching the heating on or off when the CM927 sends the signal to the relay box. The...

Thanks for the quick reply, will this be easy for an engineer to fix and if so roughly how long should it take?

We have had issues with our Performa 28 in the past and now another has reared it's ugly head. This time it's to do with our hot water or lack of! Wether it's running the shower, bath or sink the boiler will fire up and heat the water to maximum and then just switch off after a few seconds...

Our 28i is becoming a real pain in the bum, the central heating works fine and when it's on we can run the hot water tap and get hot water. The problem is when the central heating is not on and we turn the hot water tap on we only get luc warm water, we have to go up and tap the modulator to...

A big thank you to you Tony. The min gas rate has been adjusted and the heating is running 100%

Hi, I need to see if anyone on this forum can help with my problem. Our Performa 28i keeps giving us a flame failure when set to Rads/Taps. We can stand there and reset it endless times but with the same result. After leaving it for a few hours sometimes it will stay alight but as soon...

gazthepottertonengineer, Is that something I could fix on my own? or do I need to call someone in, if so who can you recommend? Cheers.

Hi, I have a Potterton performa 28 which has stop changing over to heat the water up or even heating the water when set on tap :cry: If I put it on heating + tap the heating will work but as soon as I turn the hot water tap on the flame light goes out and I can't get any hot water. The...