Trane Package Unit: YCY Re: Ignition Lockout Codes Trane YCY package units are 2-Stage Gas Heat, 1 Stage Cooling units. These units utilize an Ignition Control Board (ICB) with a built-in spark generator for electronic ignition control. The ICB has a diagnostic light to indicate heat...

Package Unit: YCY_G Re: Heating - Code 4 Code 4 = High Limit Switch Open ► The G-Series of the YCY package units utilize a Variable Speed Blower and an ICM Control Board. Qty Possible Causes: 1 Bad Blower Motor Bad ICM Control Board (ICM) Bad Ignition...

Package Unit: YCY_G Re: Convert from ECM to PSC Blower Motor This unit comes from the factory with a Variable Speed ECM blower motor and ICM fan speed control. ► In a non-warranty motor failure situation, it may be financially beneficial for the customer to convert to a standard PSC blower...

Package Unit: YCY_F Re: Heating - Code 4 Code 4 = High Limit Switch Open ► The F-Series (2 thru 4 Ton Models) of the YCY package units utilize a standard, PSC Blower Motor that is controlled by the Ignition Control Board (IGN). The 5 Ton model uses a Variable Speed Blower and an ICM control...