I do not know if I am in the right place asking this question.
My fridge/freezer is quite old, it has two compressors for the fridge and for the freezer and therefore two thermostats. Both compressors work very well and it is still in great shape. My freezer thermostat became faulty. I had a repair man come over and fitted a Danfoss 25T65 thermostat.
I attached the circuit diagram of the unit is attached.
The freezer has a super-freeze button and a thermometer in the form of LED's and also am alarm LED which should switch on if the temperature goes higher than -15 deg Celsius.
I am also attaching the explode view and also the technical specs. According to these specs the original thermostat was Ranco K54-L1924. I also found that the same thermostat is used on a Siemens and a Bosch unit.
My problem is that now the freezer is not working correctly. The super-freeze button will only work if the thermostat switches on and the alarm LED comes on when I switch on the super-freeze. Can someone figure out what might be the problem or if the thermostat is the right one.