Tag: S1-THEH21NS

Source1 S1-THEH21NS Non-Programable Thermostat  Safety Warnings P/N S1-THEH21NS CAUTION Follow Installation Instructions carefully. DISCONNECT POWER TO THE HEATER – AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT. The two Alkaline “AA” batteries must be replaced at least once every 12 months to ensure proper operation. The “Low Battery” icon will appear…