If so, how long ago? Place between wall base and unit and twist to separate unit from base. INSTALLING THERMOSTAT 1. ©2015 Lennox Industries Inc. Dallas, Texas, USA iComfort Wi-Fi® Web and Mobile Apps iComfort Wi-Fi® Thermostat THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE NOTICE Use this thermostat only as described in this manual. Are... Lennox Y2081 is blank. Are there batteries or some kind of reset? Look at the back of the thermostat and replace the three batteries. Lennox ® programmable and smart thermostats help you maximize the efficiency of your Lennox heating and cooling system. Thermostat T terminals are used for outdoor sensor input. This is the forst time. Yes it has 3 AAA batteries. Features are: Large, clear color display that shows the current and set temperatures and time. READ THIS FIRST! Link to manual. Select a location for the thermostat about 5 feet (1.5m) above the floor in an area with good air circulation at average temperature. Pro­ ... icomfort Touch ® Communicating Thermostat 49W95 49W95 ... ComfortSense® 7000 Thermostat Y2081 Y2081 3 Remote Outdoor Temperature Sensor (for dual fuel and Humiditrol) X2658 FILTERS 4 Downflow Filter Cabinet 51W07 51W08 No. Find helpful customer reviews and review ratings for Y2081 - Comfortsense 7000 by LENNOX at Amazon.com. lennox thermostat y0349 manual. and Size of filter - in. Air Handler Control ComfortSense 7000 Thermostats Single−Stage Catalog # Y0349 or Y2081 Air Conditioner Control B Y2 Y2 i− W O i+ DS L T T W2 H W3 H O C L Y2 DS DH G R Y1 W2 W1 1 2 5 On−board link Low voltage thermostat wiring Flat metal jumper 4 3 1. The manual says its a Model L7742U thermostat I am replacing. lennox thermostat troubleshooting. 3. 05/09 506228−01 2009 Lennox Industries Inc. Dallas, Texas, USA Shipping and Packing List 1 − ComfortSense® Model L7742U touch screen, 7−day program- mable thermostat 2 − Mounting screws (M3.5x25mm self−tapping screws) MLA, MPA, MPB and 3PB Single and Multi-Zone Outdoor Units wih Compatible Indoor Units Service Manual Packaged Elec/Elec / Heat Pump LRP14AC, LRP14DF, LRP14GE, LRP14HP, LRP16GE and LRP16HP Residential Packaged Units All specifications in this manual are subject to change. Your Lennox thermostat can run into simple problems related to battery issues and improper settings, so conduct a few troubleshooting steps before calling a repair technician. Ergonomic design. Lennox Y2081 is blank. The ComfortSense® 5500 Series thermostat is an electronic 7-day, single-stage, programmable, touchscreen thermostat. Contractor's Assistant: What have you tried so far with your Lennox thermostat? 2. 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