The CT3500 Programmable Thermostat provides electronic control of 24 Vac single-stage heating and cooling systems, or 750 millivolt gas heating only systems. The CT3500 has 5-1-1 programming allowing Saturday to be programmed separate from Sunday. the CT3500 programmable thermostat also provides O and B terminals if they are required for a damper or single stage heat pump reversing valve. This is a repackaged & re-tested thermostat complete with 1-year warranty from Air & Water. A top selling thermostat that has an easy to see & use backlit display.
5-1-1 program capability; offers 4 separate programs for weekdays, Saturday and Sunday
Honeywell Thermostat Smart Response technology
Meets Energy Star Criteria
24 volt gas/oil and electric heat and cooling, single stage heat pump
Large Thermostat LCD display with backlight
Poor documentation, no support bought one of these things three years ago, and support for it has disappeared from Honeywells' site. Original documentation is skimpy at best. Would avoid this product like the plague....more info