...big advantage about toolstation/screwfix is, if it is urgent, you can generally pick up immediately.
OTOH, such items are invariably rather cheaper on eBay (where plumbers and plumbing suppliers are selling off bulk purchases).
It always pays to be wary of quality, but this is an example:
www.ebay.co.uk/itm/401745048475?hash=item5d89def39b
The manual lever, if functioning, may well have a latch on the other end of the travel from "auto". If it has, latching it there should open the valve and complete the switching. (even holding it there should enable testing). I wouldn't leave it latched for a long time (though if you have a thermostat in circuit it would probably ultimately be OK) but it may provide a diagnosis with CH selected.
Last edited by: tyrednemotional on Fri 18 Nov 22 at 17:28
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