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View Full Version : Replace a Federal Pacific thermostat

casian43
Nov 21, 2016, 07:28 AM
Don't know if my Federal Pacific thermostat is a 2 or 4 wire unit
ma0641
Nov 21, 2016, 09:14 AM
Open the cover and count the wires. If it is heat or AC only it is likely a 2 wire. If it is heat/AC or a heat pump it is more than 2 wire.