I have found asi.com and they let me order a part but they keep canceling my order. I need a NuTone 478 control amplifier. No one i Houston carries them anymore can u find me someone that does. Please.Just e-0mail me.

I have model IMA303. Radio works great when I remove the smaller board #37656-1 or B T-4-0. When I replace it into the larger motherboard the radio is just static but the intercom works great. any suggestions on which board might be bad?

How much would it cost to replace the system? I have 3 bedroom, 1 patio, 1 front door w/chime speakers and the master control. I wouldn't mind putting a speaker in the basement or my 4th bedroom if it is affordable.