Hi All,

Next on my log list of "fixes" is to check out the heated mirrors, Ive just replace the NS mirror with a second hand unit, the auto dimming works but can't get the lenses to warm up, Iv tested both glasses by adding a feed to the heating elements and they warm.

What triggers the heating and under what conditions so that I can understand if I have other faults, noting shows on the diagnostics??

Thanks in advance.

I always thought they were triggered by either the heated front or rear screen, same as the heated washer jets. Current Fleet:-
2018 Discovery 5 3.0 HSE
2021 Ford Ranger Wildtrack
2019 Ford Mustang Bullitt 5.0 V8
1993 Defender 90 200TDI Pickup

Gone - not forgotten
2016 L405 4.4 SDV8 Vogue SE
2012 L322 4.4 Westminster
2004 L322 4.4 V8 Autobiography LE
2000 P38 RR 4.0 HSE (ex Clarkson test car)