The subject is a 1970's floor standing Potterton C50/15/SB. Having recently saved the boiler from almost certain death by sourcing and replacing the gas valve I now want to be prepaired for the next componant failure ! The only original part left apart from the heat exchanger is the boiler thermostat. The only markings on it are :
Ranco 250V 16A T107 Degrees C. The length of the heat sensor is 24cm.
Can anyone advise if these are available and what the equivalent part number is ?