I switched on the FBH the other night before leaving work as a heavy frost had descended. I ran it on two cycles, so it effectively ran for an hour. Not a wise move- came out a defrosted warm car and it wouldn't start! Went first turn of the key off jump leads though.
Lesson learned there!

Been there done that...... Forgot I had run it one day and not gone out in it, then ran it a couple of days later which resulted in only just starting! There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

Most are lucky to get 10mins out of their radio and you expected it to start after an hour long FBH session...