2 or 4 wire thermostat wire ?


Old 04-02-03, 11:22 AM
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2 or 4 wire thermostat wire ?

Hi, I will be getting a new zone valve installed on my bolier for new baseboard heat in my finished basement.

The wiring from my 2nd floor thermostat to the boiler is 4 wire, but only 2 wires are connected to the boiler.

My question is .. "When wiring the basement thermostat, do I use 2 wire or should I run 4 wire" ? I do not know why the original plumber used 4 wire.

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Old 04-02-03, 11:33 AM
Ed Imeduc's Avatar
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389

Id say yes pull the 4. Its always good to have more than you need. one wire could go bad later on . Or down the line something new will come out you might want to put it in and it needs more wires. SO run the 4 wire Your just talking pennies here for the wire thats all ED
Old 04-02-03, 11:40 AM
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Thanks, Ed !!


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