Tag: RTH7400 Thermostat

Honeywell Home RTH7400 Programmable Thermostat  Introduction This is a legacy product document supported by Resideo. It is no longer manufactured This manual covers the RTH7400 and RTH7500 models. (Pull thermostat from wallplate and turn over to find model number) This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply,…