DIY Doctor UK DIY Forums

Posted: **Mon Apr 06, 2009 10:22 am**

I have a Potterton Suprima 60 with a fully pumped system with 2 MVs .The problem is when the HW is on and the heating MV is closed the rads still get hot and vice versa when the heating is on and the HW valve is closed the water gets hot,it seems that they will not work separately,could the programmer (a Potterton EP2001) be at fault.
Any thoughts on tho problem. Thanks.

Posted: **Tue Apr 07, 2009 5:49 am**

Hi Bob,

Sounds like either or both your MVs at fault to me

DIY Doctor UK DIY Forums

Central heating problem.

Central heating problem.