V40 fan staying on occasionally.

Dan S. MacAbre · 2018-02-02T11:15:49+00:00

The missus has a D2 V40 (although I suppose it's the sort of thing that could happen to any model of car) whose fan will occasionally (every few weeks) stay running for a few minutes after turning the ignition off. It seems to be going at full speed, so the noise it makes is a little alarming :-), although I expect no real harm is being done. If you then go and check the temperature gauge when this happens, it's in the middle, as it usually is once the engine is warmed up. Does all this mean that something (like the thermostat) is on the way out? Or is the computer getting confused? Or any other ideas?