Central Heating Problems...

[tonynorwood]

Hi All,

Our system has chosen one of the coldest days of the year to go on the blink .....I just thought I'd ask on here to see if it might be an obvious problem that I (a complete novice) could fix rather than calling out an engineer tomorrow.

In short, one of our general electrical fuses kept tripping out every five minutes for about an hour this afternoon (specifically the "downstairs plugs" one) and now the heating doesn't seem to be working. It's a gravity based oil powered system with a honeywell st699 programmer and calfire boiler.

The honeywell programmer is now completely blank and there are no signs of life at all in the boiler which suggests that electricity isn't getting through either of them. The rest of the house is fine and the electric immersion heater is working fine so we do have access to hot water.

I think it must be an electrical problem and maybe a fuse - any ideas at all would be really gratefully received!!

Thanks

Tony

 

[dcawkwell]

Check there is power to the programmer.
If the programmer is cooked. Simply wire a live (L) to the switched (L) of the boiler and the boiler will run.

 

[tonynorwood]

Thanks very much for your help.

Schoolboy question number 1 for you - what's the best way of checking there is power in the programmer/whether the programmer is cooked?

ALso, just to confirm - if I want to bypass the programmer, I just run a wire from the L of the boiler to another L where?

Thanks again

 

[tonynorwood]

I now realise how daft those questions were.

I've moved the wiring on the boiler from S/L to L and nothing has happened.

Could it be just the fuse given both boiler and programmer have stopped working? Is there anything else that could stop power getting through to both?

Any help would be much appreciated

Tony

 

[Hugh Jaleak]

Quite possibly the fuse, but you need to ascertain (if the fuse has blown), why, otherwise it'll probably do same again, (or worse!). The boiler may require a permanent live (at L) and also a switched live (S/L), to supply power to tell it to fire when a call for heat is recieved.

To test if programmer is goosed then you will need to put a live supply to L and S/L and see if it fires up. (It may just blow the fuse again, then its back to fault finding to narrow down offending item.)