I am trying to install a Nest thermostat on a Lennox ML180UH unit that

Lennox Ml180uh. I have a Lennox ML180UH and the red light is blinking 4 times. I can’t Lennox Merit ML180E, ML180UH090E48B, 80% AFUE, 88000 BTU, 4 Ton, 1 Stage Heat, Constant Torque Upflow/Horizontal Gas Furnace Summary of Contents for Lennox ML180UH SERIES Page 1: Gas Furnace E 2015 Lennox Industries Inc

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506525−01 11/2010 Supersedes 08/2010 2010 Lennox Industries Inc Heat exchanger has been laboratory life cycle tested in excess of industry standards Dallas, Texas, USA WHAT TO DO IF YOU SMELL GAS: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other ap-pliance

I have a Lennox ML180UH furnace. It is hard to keep heating up. This. Replacement Available This product has been replaced by Cat# Print Note: Due to Lennox' ongoing commitment to quality, specifications and ratings are subject to change without notice

I have a Lennox ML180UH and the red light is blinking 4 times. I can’t. THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a. Lennox 80% Single-Stage - 88,000 BTU 'B' Cabinet Gas Furnace - ML180UH090E48B Lennox: Economical gas furnace with Power Saver technology