31www.norcold.com/cda 1200XX/120X-IMXX ModelsRefrigerator Service ManualFigure 33. Fan thermostat12 Vdc Ventilation FansThe two ventilation fans are located on top of theabsorber coils on the back of the refrigerator. They areattached to the absorber coils by brackets andmounting screws. See Figure 32. Ventilation fans aresupplied 12 Vdc through power board connections.Fan operation is automatically controlled by athermostatic switch. The thermostatic switch ismounted on the first condenser fin. See Figure 33. Theswitch turns the fan on when the temperature isapproximately 130 °F. The switch turns the fan offwhen fin temperature drops to approximately 115 °F.Ice Maker AC Power Cord - Earlier ModelsOn earlier models, the ice maker power cord and theAC power cord are connected as one unit. Figure 30shows the AC power cord for earlier models withoutice makers (Figure 30a), and the AC power cord forearlier models with an ice maker (Figure 30b).Ice Maker AC Power Cord - Later ModelsThe ice maker is supplied AC power through the whiteAC power cord, which is separate from the powerboard AC cord. The cord and its connections to theice maker wire harness are shown in Figure 31. Theice maker cord can be detached from the power boardAC cord by cutting the two plastic cable ties holdingthem together.Figure 32. Fans mounted on the top absorber coilFigure 31. Ice maker power cordFan mounting screwsBracket mounting screwsSmooth wire/male connectorTo black ice maker wireShort white wire/female connectorTo water valve solenoidBrown wire/female connectorTo water valve solenoidGroundTo refrigerator metal plateRibbed wire/female connectorTo white ice maker wireTo ice makerwire harnessFirst finThermostatic switchFrom power boardTo red fan wireAlthough the power board supplies power to the fans,it does not control the fans' operation. Fan operationis controlled by the fan thermostatic switch locatedon the condenser.NOTEGround wireRibbed black leadto white ice maker wireSmooth black leadto black ice maker wireGround wireREFRIGERATORS WITH ICE MAKERSREFRIGERATORS WITHOUT ICE MAKERS(a)(b)Figure 30. AC power cord - older models