This is not an issue - a typical fan left on for 3 hours continuously will cost about 1p in electricity.
Far less for the average trip to the bathroom.
Will have to look how mine is wired, it’s a timer one on a pull switch but doesn’t run on after the switch is turned off. There an isolator next to it in the loft.
Sorry to hijack the post.
To start with mine looks like it’s leaking a bit.
The wires in the unit have a jumper between 2 of the points. The isolator has 3 wires.
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.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local