Hello. We're looking to replace our old thermostats with programmable ones. We currently have a 3-wire oil heat hot water baseboard system.
Seems all the new thermostat packages says for use with 2 wire and explicitly say not for use with 3 wire.
The guy at the plumbing supply store said we had to rewire our zones for two wire. Is this correct? Are there any other options for 3 wire systems?
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