I drained my C/H boiled down over the weekend to fit a new 2 way MV, power and boiler was turned off, I have just come to reignite the boiler (ideal standard) and it will not light. what voltage should I get at the lead into the valve. I get no reading what so ever, ther is some sort of suppressor across the pos & neg conections in the boiler con box. how do i test that. all was ok until i turned off the power on sat. 
) you said modle not makeOOPs Iknew I should have gone to spec savers.I have sorted out the problem, I was getting know voltage at the end of the cable to the sol and no voltage at the other end of cable feeding the sol. Some how or other the Gremlins had pulled out the pos wire in the junction box some five feet away on the wall 
