Diverter valve ferroli optimax c31

[Robinma2000]

What causes the diverter valve to operate? I have replaced mine a couple of times, but the rads still getting warm when I draw hot water. I assume the diverter valve is not operating. But what triggers it to shut off?. I'm looking for a problem earlier on in the process I guess?

 

[muggles]

The motor operates the valve, so maybe that's not moving properly?

 

[Robinma2000]

Makes sense, but what energises the motor? How does the boiler know the hot water is being called for?

 

[sxturbo]

Should be a flow switch

 

[Robinma2000]

So previously I changed the flow sensor and didnt make a good job of it. I either misfitted it or it was faulty part. Basically it wasnt sensensing any flow, but the result was the ignitors were not firing. When I put the old one back it started firing again. So my conclusion was the flow sensor told the ignitors they had to fire. But I didnt know if the also told the diverter valve to switch