05 land rover freelander. When turn on ac, high speed fan will not turn.replace the engine coolant temperature sensor. I unplug the switch of the fan and jumped it to the battery high speed came on.

SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on

the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck

SOURCE: 95 grand am radiator fan only runs with AC on

Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson

SOURCE: Land Rover Freelander heater/fan switch not working

u need a Freelander Blower Fan Speed Repair Kit
go on e-bay Item number: 160320517862

SOURCE: Fuel Filter in Freelander (replacing)

The fuel filter is located below the electrics box, half way between the battery and the bulkhead on the passenger side, under the bonnet. It is very difficult to see how it all fits, but it has a central screw which holds the plastic filter housing/mounting in place. Find this screw (which is a small self tapper) and be prepared to loose it, or use a magnetic screw driver. Then lift the plastic housing up and away, (towards the engine) be ready with loads of rags to catch the diesel fuel when you disconnect the pipes. There is an earth wire attached to the housing also. (anti interference, I think) It is quite a fiddle getting it back again, as it has two locating lugs on the back of the plastic housing/mounting.

SOURCE: 2002 Land Rover Freelander radiator and air fan not working

there is a module mounted on the fan shroud that is a common problem. but as always, check fuses, connectors and grounds!