repressurised pv on ariston boiler - no heating or water!

[EmmaP]

Hi everyone - we have an ariston microgenus he boiler, Following advice at
www.diynot.com/forums/viewtopic.php?p=251090#251090

my husband repressurised the PV because the boiler has been losing pressure over last couple of weeks and we have beeen getting the E02 error code and no heating/ water. No water came from valve of PV so we are thinking it isn/t split so we went ahead and followed instructions. Since doing this now on turning on the boiler for heating or hot water the boiler is not igniting / firing up and then the E02 error code comes up straight away. Is there something obvious we are missing or could it be something electrical?

 

[picasso]

Have you filled the boiler with water ? gotta ask as we never know what people have missed.

 

[EmmaP]

Yes refilled to 1.5 bar.

 

[algas]

Fill it ti 1.75 bar sometimes these boilers need a little extra to jolt them into life, also I assume that you have pressed the re- set buttin

 

[algas]

Fill it ti 1.75 bar sometimes these boilers need a little extra to jolt them into life, also I assume that you have pressed the re- set buttin

 

[EmmaP]

It is slightly over prob about 1.75 and all switched back on. Does respond to turning on tap or switching heating on but does not ignite and then 30 seconds later goes into fault mode

 

[picasso]

Turn the boiler off at the main switch wait for( 10? )seconds and switch back on if that does not work then its possible the pressure switch is blocked.

 

[picasso]

bloody computer

 

[Gasguru]

Yep, pressure switch probably blocked or out of calibration...don't set the pressure to 1.75, it's way too high and leaves insufficent margin for expansion. 1 Bar perfectly adequate for most system. Advice on this forum is going downhill fast

 

[EmmaP]

Thanks for your replies. Did reduce pressure back down. Heating engineer did come out in the end. Said perhaps pressure release valve may need replacing and he fiddled about and found an internal contact misaligned as well. Currently working again.