Description
Old ref numbers: 74556, 100-01398-09, Invensys
Obsolete: use 77119.
This obsolete IQ2020 Heater Relay Circuit Board is used on the 2001-2009.5 IQ2020 Control Box. It’s upgraded design provides a more efficient method of connecting the heater’s power cord to this board reducing fatigue on the three relays.
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