Hot socket when switched on

It needs checking out by an electrician, my advice is don’t use it until it’s checked out.

Usually a fan heater requires a lot of power to work, most fan heaters are around 2000W (2KW) and if it is running for long periods of time it will cause it to go hot as it's pulling a lot of power. Just in case, have the socket checked out as there could be a loose connection at the back. I would stop using the heater, if not keep it on for short periods of time. If it is still getting extremely hot then definitely have it checked out by a competent person.

Sounds like you have a loose connection in the socket or plug of the heater. This is causing arching during load situation which is where the heat is coming from. Call an electrician or turn the power off at the fuse board, test to see if the socket is still live, if it is dead, take out the plate screws and tighten up all terminals, do the same for the terminals in the plug of the heater. This is relatively common as connections can become loose over a long period of time.

Normally when something is getting hot it’s a sigh that the installed components are unsuitable for the task or there is a fault with the component or the load on the component is to high. In this case, i imagine the heater is pull a great deal of power. A switch with a socket in the same accessory is not common and imagine its fitted in a kitchen and the switch is controlling an under cupboard light? The problem does require investigation, but check to see if its not hot when the heater is not conected. Thanks