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Just bought a vacation home.  Just want to keep pipes from freezing in winter.  Present thermostat has R,R,O, black(W label) and G.  Bought Honeywell RTH9585WF smart thermostat.  Can I hook up AC and heat? Though only controlling heat remotely.  WITH a 24v transformer?  Option B (approved by Honeywell) is to switch out  thermostat each change of seasons.  Doable but a [aom

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