Hello Forum

Following on from my previous post

My old Hotpoint fridge 8221 has a burnt Starting Relay and packed up.
I looked online and appears ePTC 103N0050 is recommend for this model and was able to source.

I fittted the 103N0050 Monday, the fridge started up immediately.

However the fridge is to cold and freezing food and does not appear stop running the compressor ever.

Compressor does not appear to stop even with the
air circulation flaps closed,
thermostat on 1 and even tried pressing defrost button on the thermostat and turning to 0.

I was thinking I next need to check the thermosat/replace if want try fixing?
So a universal thermostat?

Other possible consideration the Fridge is in unheated property near London.
Door seals

Thank you
Iain