I have a Vitodens 200 system, and I cannot find the part I need in the diagram... unless that means I have to buy an entire radial fan unit. Under the radial fan (Part #40) there is a flap that acts as a damper at the air intake, it is about 2"x1 1/2" and has two small extensions that act as hinges, it sits in a removable housing. One of the extensions broke off and I would like to replace the flap, but as close as I can get on the parts diagram is the entire radial fan. Any thoughts? Thanks in advance.
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