Sorry if it’s a daft question but have you tried the sky light company?

Edited By V8Eng on 19/03/2023 10:37:45

I often find that unusual switches use a custom mechanical housing with the actual switch behind being a common off the shelf part. Take a photo of the back, and if here is any numbers printed anywhere note those down. I wouldn't be at all surprised if it was a couple of bog standard parts.

332RF will do what you need.

When I look at it, 27120 also comes up as an alternative. Comments on 27120 from 'ProGuy' say "Great for controlling roller shutters where you need it to be normally off, then be able to switch it up or down to higher or lower the shutter."

I think what he says is equivalent to your desired appllication.

Edited By DC31k on 19/03/2023 10:59:05

Take an AA battery, an LED and a resistor into Screwfix. Connect up the switch after you have bought it and see if the current path through it meets your needs or not.

If it does not, return it.

You could also buy a multimeter from SF at the same time and use that to verify the switch's operation.

Domestic switches usually use compressed springs between the outside switch part and the inside metal part that actually does the switching. The springs produce a very quick switching action, to prevent arcs, and they also 'lock' the switch contacts into the on or off position,

Momentary action switches will not have this, since the terminals don't need to be 'locked' off or on. So they will have a different mechanism and won't be a normal switch with a bit of internal plastic added or removed or whatever.

Unfortunately, manufacturers, designers and suppliers seem to be very conservative and only produce or stock what 95% of installers need. So your quest is likely to be frustrating. I suspect you will have to do some detective work to find and contact the makers of the broken switch – assuming you cannot fix that one, of course. Some can be taken apart, and you might find that a good clean out and reassembly will fix the old switch.

Thanks. Every day is a learning day