-Because it is of aluminum and cost me 145 USD incl. freight.
Why not complain?
-I have, the store don't answer.
Why not just send it back?
-I live in Norway. Freight costs for sending the unit back, and they send me a new one will probably be close to, or higher, than the units value.
That's why I will give a rebuild a try first. If that doesnt cure the problem I'll buy a new, cast iron one.