series 2a sender on top of the head

i have a series 2a ex military,2 1/4 petrol, it had a capillary temp gauge at some point but when i got it, it had been cut, it now has a elec gauge and sender, but on the top of the head there is another sender that is held in with three small bolts, it isnt connected up to anything, i have searched the forum but cant find anything on it, can anyone tell me what it is, thanks in advance

Its called choke thermostat switch for choke warning light

Yup, choke thermostat switch.
If you've got the switch in the choke cable it means the cold start light is only on if the choke is out and the engine is hot.

oxides said:

Yup, choke thermostat switch.
If you've got the switch in the choke cable it means the cold start light is only on if the choke is out and the engine is hot.

Click to expand...

niceone, its not connected to anything and the landy has a webber carb coversion with a manual choke, so realy i dont need it then, thanks for the info