The same subject came up not too long ago and if I remember correctly, it comes on automatically when outside temp dropped below a certain amount. I belief that was -4 ish, or could have been -7. But I think you’ll have to wait until it’s a bit colder to confirm. I’ll see if I can trace the thread.
I’m starting to think now I’m talking a load of bo#%^*ks. Sorry. Can’t find what I was looking for but will continue the search
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Current, XC60 AWD D5 SE DRIVe
1st motor. Austin A35, indicators and heater optional.
Not forgetting RTFM
Last edited by Deck1ng; Jun 9th, 2021 at 16:59.
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