Ariston microsystem 21/28 pilot light not working

[david_uk]

Hi,

A mate of mine has a problem with one of these boilers. The pilot light won't come on. I understand the guy servicing it has changed the ignitor, the PCB and the air pressure switch. Pilot light still won't ignite. I gather the top two lights are on, but the bottom one isn't and pressing the ignition switch does nothing.The guy gave up at this point.

He's thinking of ringing Ariston to find out who can do this locally, but he would like to know what is likely to be the fault from the point of how much more it's going to cost to fix.

 

[bellairaphon]

does this guy know how to fix a boiler? id get your mate to get someone who knows what there doing. what 2 top lights are on?

Nath

 

[david_uk]

I have my doubts TBH.

The lights that are lighting up are the top two - on/off and heating active.

 

[bellairaphon]

well has he checked the basics is there a demand for heating? if the heating is on the there has to be a demand from somewhere. does it have an inbuilt clock? room stat turned up. system pressure 1.5 bar. if yes does pump run does fan run does boiler spark if yes to all them then does he get voltage to gas valve is gas coming to valve? if no voltage then go to pcb

Nath