ECM blower accessory Part No. 58SSB900131 is used on 2-ton cooling 58SSB060 furnace and Part No. 58SSB900141 is used on3-toncooling58SSB080 furnace. Each ECM blower kit comes completely assembled with an ECM blower motor and controller, and interface circuit board. See Table 1 for a list of parts in assembly shown in Fig. 1. ECM blower kit is used in conjunction with following variable speed outdoor units: 38EV024320 38EV036320 38QV024320 38QV036320 This ECM blower is controlled by outdoo