SIME boiler water temperature continually changing

[yecart]

I have a SIME Super 102 de lux, which has stopped producing constant hot water. When the hot water tap is turned on (and it is turned on full) after a short while the water becomes hot but after a minute it goes cold and then continually goes from hot to cold at very short intervals. It is almost impossible to shower because of the constant change in temperature.
Does anyone have any idea what the problem is as the plumber who fitted it seems unable to correct the problem?

Dave Tracey

 

[KathyM]

Dave

Sounds like you have same problem as me, ie boiler keeps cutting out therefore fluctuating water temps. Our plumber been working on prob for 2 months. The only thing that made a difference, although temporary, was cleaning the divertor valve. But after 10 days it went back the way it was. Am going to suggest to plumber that he changes the diaphragm inside the divertor valve. Will let you know if we have success!

 

[lucki]

this problem would be solved if you take out the hot water heat exchanger out and flushed out with water its probely scaled up