i have a Thermador combination gas cooktop (GCV36G) ventilating downdraft system with CV2236 ventilator intake unit and CV2336 remote or CV2536 cabinet blower. it was installed in 1987!!! it works fine except now a part of the downdraft vent wheel is broken off so the downdraft vent rises as it should on the push of the up remote button located on the cooktop, but upon pressing the down remote button, it just drops down in one swift move. i was told i need a wheel part, manufacturers part #486464 Part #AP 2836240. i am trying to find that wheel part. thanks
