I have a 9 year old Broan KW 400 series intercom master that has recently failed that measures 8 inches in width and is 16 inches long. It has these numbers on the back (KWHCT40X 99701176 and it takes a 9701177 transformer. I would like to know what the replacement until model is and price as well as the possibility of forwarding the original for repair or tradein. Please respond at your ealiest convenience as without the intercom----everyone is starting to yell!!! Best regards, Thomas Bardwell

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