2002 V70 XC, I seem to have an electrical gremlin. Sometimes if I have the climate control blower switch turned on when I shut off the car, and it's always somewhere partially on not full on, at some point maybe a few minutes after I turn the car off, I'll come back to the car and I hear the blower motor running fast enough that I can hear it outside of the car. It has come back on by itself and sounds like it is running at full speed. There are no LEDs lit on the blower speed selector switch at that point and everything else is still off. This is an intermittent problem but it never happens if I switch the blower motor completely off before turning off the car. If I forget to switch off the blower before turning off the car, as happened this afternoon, when I come back and hear the blower running, I put the key in and turn it back to the On position, turn off the blower, turn the key back off and the blower stays off permanently.
I've made a habit of turning the blower switch to the off position before I turn the key off, and if I follow this method I've never observed the blower having come back on while I was away.
When the problem occurs, after I turn the key back on I'm sure the blower speed switches from high speed back to the set speed when I turned off the car, and the number of LED's lit on the blower speed selector is where the blower speed was set when I turned off the car. At that point I turn off the blower then turn the key switch back off, and as expected the blower stays off.
FWIW I never use the Auto setting on the climate control. I have pushed the Auto button before so I can say that the Auto switch does toggle between Amber and green LEDs when you keep pressing it. But I always use manual settings. Just never thought about using Auto.
Anyone else ever experienced this? Turning off the blower before turning off the car seems to be an effective workaround. But I reckon this behavior can't be normal and I'm concerned that it could get worse where it does it even when I've turned the blower off before shutting off the car, and keep it running overnight or all day at work and maybe run the battery down.
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