Potterton Performa 28 No hot water

[yardicus]

Hi Guys, I have a problem with my Performa 28, Heating works but no hot water.

I have a hot water sensor fault light flashing.

In feburary I replaced the diaphram inside the diverter valve (was easier than replacing the whole thing), I have checked and when the hot water is turned on the micro switch is activated on the front of the diverter.

What else should I look at?

 

[Billy Bob Bob]

start with a hot water thermistor,you may have other problems but you need to eliminate that first