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Compatible with a 24 VAC standard thermostat. The twinning feature is available only on models F8005008. The circuit board is phasedetected and synchronized. Provides diagnostic LED to aid in troubleshooting.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.