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Ranco is a brand name of Robertshaw. Robertshaw was founded in 1899 by Frederick W. Robertshaw who is credited with inventing the thermostat. Headquartered in Itasca, IL, Robertshaw was acquired by One Rock Capital Partners, a private equity firm, in 2018.

Publication 354-00027-001 Rev E 2008 : Eco-Cool E71R & E72R Temperature and Defrost Controller.