Originally Posted by HighlandPete
Engine off.... this is a high demand function and will be governed by the energy management system.
I don't know the exact command strategy, but it is regulated (amidst other criteria) for under/over voltage, so can't imagine it is even available without the engine running.
Agreed. Warm air comes out of my F10 almost immediately, but only if the engine is running to power the ceramic heater,
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