potterton suprima boiler

chocca

Hi, I've read the old threads about the suprima boilers and their dodgy pcb's but I'm not sure if the fault on mine is covered...

On a 'normal' day it works just dandy. Room gets cold, stat calls, boiler heats rads.

Water tank gets cold, tank stat calls, boiler heats tank. Yay!

These days... Room gets cold, room stat calls, boiler LED f;lashes yellow on for 2 seconds, off for one, and boiler doesn't fire. There's 240v at the 'call' terminal and no voltage at the pump output If I turn off the boiler control knob, the LED flashes yellow on/off like a car indicator.

The same effect for hot water too.

It can be 'off' all day (yesterday for example) and we go to bed cold, only for the thing to come to life in the middle of the night. It'll work fine for a few days sometimes, other times like this week it's been playing up all the time - and it's really not the weather for it :mad:

Every now and again it'll lockout and the LED will light red. Sometimes it'll reset to green and the boiler will fire, sometimes it'll go back to the flashing yellow and sod all will happen.

I've got the handbook and there's a comprehensive list of LED codes - just not the yellow on for 2 seconds/off for 1 - so, does it sound like a candidate for a PCB change?

roger196

Post your query on www.diydoctor.org under central heating or gas giving model number and approx year of instalation.

keystone

Flashing Amber light will be a PCB fault but you may have underlying electrical problems elsewhere - like the roomstat.

Cheers

chocca

keystone wrote: »

Flashing Amber light will be a PCB fault but you may have underlying electrical problems elsewhere - like the roomstat.

Cheers

Thanks for that. Room stat and cylinder stat are both working ok (I'm a sparky by trade and I've wired more heating systems than I care to remember - it's the mysterious goings on in the boiler that baffle me lol)

chocca

roger196 wrote: »

Post your query on (removed by anti-spam software) under central heating or gas giving model number and approx year of instalation.

Duly noted and posted thanks (the links right but should end .uk after the org by the way if anyone else is trying to get there)

keystone

chocca wrote: »

Duly noted and posted thanks (the links right but should end .uk after the org by the way if anyone else is trying to get there)

You'll not get an instant answer. All posts there have to be "approved" by a moderator first before they appear on the forum and the any replies have to be similarly approved (well apart from two (but only two) posters who get straight through). Mods don't look at it all the time so it could be tomorrow morning before your post appears and tomorrow evening before you see a reply. Just so you understand you are not being ignored if you don't get an instant reply.

Cheers