Temperature problem...

My car is a 1999 Peugeot 306 1.6 with AC

I could really need some inputs, since im stuck...

The problem:
-The temperature gets to hot. 100-110c
-Driving up a hill makes the temp rise and almost goes into the red.
-Unplugging the fan coolant sensor so both fans operate at full speed does not help
-If i open the bleeding screw on the hose to the bulk head i get a steady stream of water that follows the revs. (Rules out waterpump???)
-I get a steady flow of hot air from the heater.

The low speed fan that should kick in at 97c does not kick in before temp gauge shows appr. 105-107c
High speed fan should kick in at 107,c but it does not engage.

What i have done:

-Changed thermostat=no difference
-Changed radiator + coolant= no difference
-Changed temp sender to gauge and temp sender to fan ECU= no diffence
-New earth cable from gearbox and battery= no difference
-Cleaned cable connection the fans=no difference
-Tried another (used) fan control unit ECU (Bitron) = no difference

I I’m stuck with this problem, so if anyone have any ideas on what could be wrong let me know