Thermocouple

[Bahco]

I've always wondered why the thermocouple on my last boiler used to need replacing every 6-9 months.
The boiler make was a BKL and used to eat them on a regular basis.
I replaced it with a Valiant last year.
Was the boiler a poor model or was it something else?

 

[corgiman]

Could be that the thermocuples fitted were a bit cheap and cheerful or that the pilot light was too big but 6-9 months is a bit frequent to say the least

 

[Bahco]

I used to use the universal ones from Plumb Centre at £3.50 each if that helps .

 

[ChrisR]

Universals are the worst. Mfrs originals last much longer. Vokera ones never need replacing, we're told. You can try nickel plated ones intended for LPG.

 

[krispy]

worn pilot burners or injectors will also cause premature failure of thermocouples i believe

 

[Bahco]

THANKS GUYS