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Main image of P621U 5/1/1-Day Programmable Universal 2-Heat/1-Cool Thermostat | Universal 5/1/1-Day, 2-Heat/1-Cool, Batteries Included

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P621U 5/1/1-Day Programmable Universal 2-Heat/1-Cool Thermostat | Universal 5/1/1-Day, 2-Heat/1-Cool, Batteries Included

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Elevate your atmosphere, great for heating and cooling systems including single and multi-stage heat pumps
Universally Compatible, works with all system types except electric baseboard heat
Breath easy, know when to change your air filter with the graphical air filter monitor
Slide into comfort, with the exclusive LUX speed slide delivering effortless programming
Simple scheduling, separate weekday and weekend programming with 2 or 4 periods per day puts comfort on your schedule

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LUX TX-U Series Thermostats

Details
Brand	LUX
Type	Universal compatibility for conventional heat & A/C. Universal compatibility for heat pumps with up to 2-stage heat/1 stage cool (including AUX/EMERG heat). 2 and 3-wire hydronic systems (hot water baseboard & radiator). Gas Millivolt heaters (wall heaters/furnaces & gas fireplaces)
Color	White
Features	Universal compatibility for conventional heat & A/C. Universal compatibility for heat pumps with up to 2-stage heat/1 stage cool (including AUX/EMERG heat). 2 and 3-wire hydronic systems (hot water baseboard & radiator). Gas Millivolt heaters (wall heaters/furnaces & gas fireplaces)

Additional Information
First Listed on Newegg	November 12, 2026

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Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Temonick shop Return Policy

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Item#: 9SIC9EZMAJ1288