Check your belts, you likely smoked one when it was frozen. Check your clearance between the fan and shroud. Make sure there is no slop in any shafts.
There should be a weep hole there . If not you could add one.
Do you park the machine inside where its heated? That could be a problem. Might want to use fluid film or similar on the chute area to prevent sticking.
Could be a shear on the fan as well as BT suggests.