“i have a taco sr530 switching control for my in floor heating zones that my thermostat is wired to . they are using two wires with a third wire folded back. can i use the new nest with this set up .”
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To make sure that your system is compatible with Nest Learning Thermostat, you can use the Compatibility Checker here: https://store.google.com/us/widget/compatibility/thermostat
Sorry, there was a problem. Please try again later.Best doesn't need the pigtail wire (connector) to work. My system also had a pigtail but no longer needs it. You should be fine. Perhaps look at the install videos online and make sure your wires match up otherwise prior to purchasing
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