Honeywell T7100D 1019 Microelectronic Thermostat. New. 085267160001. Use With Q7100D. A Subbase in a 24 VAC Heating and Colling System. Direct Power From 24V Transformer. Tradeline T7100D 1019. Automatic Changeover. No System or Fan Selection Available. Self Test Mode Simplifies Troublshooting. Free US Shipping.
