No they don't come on in the day either.
There is no specific fuse for the storage heaters. I presume the "downstairs sockets" is the fuse for them. (Both storage heaters are downstairs).
Hi,
I have storage heaters which run on the dual tariff economy 7 system. I was with SEE and everything was fine. But then I switched to British Gas and suddenly the storage heaters stopped working. An electrician came out and tested the heaters (by switching them onto the main day time supply...