Hi all,


After replacing the blower fan unit last Dec, i'd been using the EC mode and low fan speed all the time and it works fine.

Last week on a very cold morning, around -20, my wife was taking the children to school and she called saying that there's noise coming from the fan that ran in non EC mode. Now this intermittent, sounded like a bad bearing noise, occurs whenever the Auto fan speed and non EC mode was selected.

The question is why it doesn't come in EC mode + low fan speed?
Any suggestion?

Thanks and have a nice day.

John