Hi @hass1957
Don't know the vehicle or the coolant temp at which the fan has to operate but here's the engine mechanical section from the service manual that may help.
Go to p.117 to view the procedure to refill/bleed the cooling system. According to the manual the fan should come on at least 3-5 times during the procedure. There is no mention about the ambient temp but since the vehicle is stationary there would be no cooling air flowing through the radiator like when the vehicle is moving.
The radiator repair section starts on p.129, just in case you missed a step
When you ran the engine to bleed the air out did you notice the coolant "flowing" in the neck of the radiator, indicating that the thermostat had opened?
There are two fan relays in the fuse box i.e. low fan and high fan which control the speed of the fan. They are operated by the emc (engine management control unit) in the vehicle. The coolant temp sender is also connected to the emc and presumably when the coolant reaches the requisite temp, the relay would be operated to turn the fan on.
Maybe check the connections to the temperature sending unit and also the fan electrical connections