Problems with Burshaw Berko

[Arnold9801]

I use these for cleaning of my beehive frames, but today it was knocking off after a few minutes.

Can anyone advise me on whether this is simply due to a faulty thermostat and if so are they readily available?

Regards

 

[Tris]

https://www.ascateringsupplies.com/...urer /// Burco&nR[visibility_catalog][=][0]=1
Seems most parts are still available