Boiler not working during day

[Vingdom]

Hello all,

I have a Potterton Suprima 70L and it is due to turn off and on 3 times a day. At 7.30am-9.30am, at 4pm-9pm and at 10pm-11pm.

The problem is that it never turns on for the second interval but always works for the other two. When I set the mode to *on* it doesn't do anything, it only adheres to the *timed* mode.

I have checked the thermostat and that is cranked up to full. I checked the boiler and when it has this problem it flashes green/amber simultaneously. I then try hitting the *reset* button and it does nothing.

In the last year I had the motherboard changed when it wasn't working at that fixed it. Apart from that I have never really had any problems with it.

Any help would be greatly appreciated.

Kind regards,

Vingdom

 

[Agile]

I suppose you could check for a voltage to the call for heat terminals on the boiler if you can test mains voltages safely.

Tony

 

[Vingdom]

Thanks for the reply but I don't know how to do that. I just can't fathom why it doesn't work in the afternoon