Amana evap fan not running please help

Hi all

I am based in the UK and desperately looking for some advice.

I have an Amana SRD522VE side by side fridge, the following has been replaced as the evap fan is not running

Evap fan replaced
Defrost timer replaced
Defrost heater replaced

Yet the evap fan still does not work

I have even bypassed the defrost thermostat, and cut the defrost thermostat out and joined the brown and orange wires together but still evap fan does not run

The compressor runs the coils are frozen and the condensor fan is also running

Please help