I have an old Liebheer fridge and believe the thermostat is faulty and removed it for the number to be seen. I am inexperienced with the whole subject. The no. is Ranco K52 L1541 with 2 wires , one with probe and other coils onto a plastic former in a roll. I am having big difficulties to find this part online in fact any material at all on it … has the number changed..can I use a different part etc ? The fridge was not turning on until about 18 degc and switching off at about 13 degc so useless to me and suspect this is the fault . Thks David