2002/02 plate Vauxhall Zafira 1.8 club Z18XE
The problem is the cooling fans keep running and the coolant warning lamp comes and goes. So done a scan and no codes in engine management if I go in to instrument panel I get code 166 (engine coolant temperature circuit high input)
The weird thing is if I disconnect the cooling fans and start from cold and allow the engine to get to about 70 degrees and plug the fans in everything works ok until I switch off and allow things to cool then the fault re occurs.
So far changed the coolant sensor for new genuine vx and changed the control box under the front bumper for a good second hand unit removed the dash clock assembly checked all the connections and nothing obvious.
Has anyone had this problem before,
Any help much appreciated.