Appliance Repair Questions? Ask a Technician for Answers ASAP
You could speed up the process by using a hairdryer on a warm heat, but don't get it to close to any plastic as it may warp it.
Once the ice has gone switch it back on and use the Power Freeze setting to get it back down to -18C. I think the air vent and fan you're referring to is in the fridge rather than the freezer.
I hope that helps, if so a positive rating would be much appreciated.
Do you require any further assistance?
If not, I hope my answer was helpful and if so a positive rating would be much appreciated.