Electric Storage Heater Wont Cool Down

[fabemmy]

We have just moved into a new house where its all electric heating. We switched one of the electric heaters on in the living room around 7am this morning and switched off about 9am but the heater as still been quite warm all day even though its been fully switched off. Its as if the heater is still on without any power.

anyone know what could be wrong with it apart from broken.

[Maydup]

In fact, the two meters are for the day and night use. The night one takes over the house once the network sends the lower tariff supply. When the day one kicks in again, the heaters go off but everything else stays on at the higher day rate.