I changed the one at the back in the block hose. Not sure about the fan. Would i need to open it up to confirm?
The belt is on and it can be turned by hand.
Also the wiring to the ntc appeared to be fine.
It failed the first test. I let it run on dry for a few mins and the fan didnt turn so i gave it a little nudge and it started spinning but making a fairly load screetching noise. I switched it off and started another dry cycle and the fan kicked in without manual assistance but carried on making the screetching sound.
Btw the metal chamber next to the fan, where i guess the element is placed, gets red hot
Just to confirm you think it is the blower chamber (assembly ventilator) that needs changing rather than the fan motor?
Also to clarify the fan motor and the wheel on the assembly ventilator are not both turning without jamming but making the loud scretching sound (i tested it again)