saunier duval 623

[peter the plumber]

hi have this boiler no hot water or heating.the pilot is alight and fan running ,pressure is 1.5 bar.Pressure switch is making switch ,could yo please advise how to test to see if gas valve has power going to it.There are two wires going to the solnoid on gas valve ,could any one help with any other advice to get this boiler going thanks peter

 

[ollski]

multimeter?, are you getting volage on one of the wires at least?

 

[peter the plumber]

hi ollski what is the best way to test,is one side of multi go to earth and other to terminal or a prope to each terminal.How old are these boilers thanks peter

 

[gas4you]

One test point on gas valve live, other on common neutral at wiring block.

 

[peter the plumber]

thanks dave

 

[scatmanjohn]

It could be the high limit stat.

Top left of heat exchanger (violet spot i believe they call the sensor).