Gloworm Fuelsaver MK2 50BR won't light

[RobL]

Hi new to this so apologies if I don't explain anything properly.

System is 7 radiators - 4 up, 3 down, Potterton controller and 2 motorised PMV2 valves.

Turned the heating on last week for the first time since around May, at the weekend.

Only the upstairs radiators got warm, and then only the tops. Also the hot water packed up.

So... changed the motorised valve on the hot water - old one had burnt out, then drained the heating system via the lowest radiator, added cleaner, refilled, bled all of the rads, the pump, and the boiler.

Switched back on and only the nearest rad got hot and none of the others worked.

About an hour later it all went cold and the boiler main burners refused to light.

This morning the pilot has gone out and although lights immediately, goes out when you release the button at the end of the cycle.

The boiler has had an annual service for at least the last 8 years (we used to rent the house out as we lived away for a while).

Any ideas - I have a back ground in electronics but won't touch any gas parts of the system for obvious reasons!

Thanks,

Rob.

 

[spraggo]

sorry misread post

 

[RobL]

sorry misread post

No worries.

 

[spraggo]

Did you keep the button pressed in for at least 30 seconds after the pilot lit?. Does the pilot flame envelop the thermo-couple?.

 

[RobL]

Did you keep the button pressed in for at least 30 seconds after the pilot lit?. Does the pilot flame envelop the thermo-couple?.[/quote

Yes, up to about a minute and it appears to heat up a thermocouple.

Thanks,
Rob.

 

[misterdubya]

This may need a part inside the CC as it sounds as though the boiler has overheated initially, but forum rules prevent me from giving advice. Contact an RGI - and get him / her to check the boiler stat is operating properly aswell, as it incorporates the Pump Over-run stat.

Some parts can be 'bridged' by an RGI to test for failure but not left fail safe.

 

[RobL]

Hi Spraggo & Misterdubya,

Thanks very much - I just held the green button in for 2 minutes and when letting go, the pilot stayed on.

Then I turned on the electrics and turn the boiler back up from start and the whole thing fired up.

Must have tricked the Thermocouple or counteracted the very high wind on that outside wall.

Going to get it checked out anyway.

Cheers,

Rob.