Re: Smeg A1 thermocouple source and replacement
John
The thermocouples are all different.
Rear right is 948650037
Front right is 948650036
Centre is 948650037
Rear left is 948650038
Front left is 948650033
In general, the standard thermocouple for the A2 will fit most Smeg range cookers. 948650108.
I can only advise that a CORGI registered engineer carries out this repair and am unable to offer you instructions for unscrewing the hobtop.
Smeg can be contacted on 0870 444 7002
You could also try Repairs@ for a local engineer.
Craig