Thanks. Well its a rover 620ti having problems with coolant fans not kicking in unless the sensor is unplugged ive tried 3 sensors still no luck i asked about the relay but was told if they come in when sensor unplugged the relays are working im out of ideas now
If the ECU starts the fans when the sensor is unplugged the ECU and the fans are ok, and so is the wiring to the sensor so I would change the sensor, about £10 from DMGRS.
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Former custodian of the legend that was FE54 - RIP
I had this issue on my ZR last month after years of having to run without the sensor plugged in.
Despite fitting a new sensor I had the same issue; had the car in at the garage and they reset the sensor. Good as gold.