Fuse Board Noise

20 Oct 2010
Reaction score
United Kingdom

Our fuse board makes a buzzing noise every so often, I think this is something to with the supply to the storage heaters in our house, when I pull back the fuse marked as the "contactor supply" the noise go straight away , its a 5amp fuse.

Any help would be super

Kind Regards
Sponsored Links
The buzz is almost certainly coming from the contactor that switches the power to the storage heaters. The contactor is a switch that can safely switch the very large current that storage heaters take. It's switch contacts are closed when a very small current flows through the coil of an AC electro-magnetic which pull the contacts together. The magnetic field is not continuous but like AC current changes direction 100 times a second. Some loose bits of metal will vibrate as a result.

In almost all cases the noise is harmless but if it gets louder or there is any sign of heat in the contactor then a full check and maybe replacement should be considered.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links