Honeywell YCT33A1000 Economy Millivolt Thermostat

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Easy to install and use, compatible with heat only systems, economy model - simple, worry-free operation, mounting hardware and wall plate included, mercury free.
SKU: 42779483
MFG: YCT33A1000
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The Honeywell Millivolt Heat Only Thermostat is non-programmable and has low voltage controls with a snap action switch for millivolt systems such as fireplaces and floor or wall furnace systems. This model is not compatible with electric baseboard heat systems, heat pump systems, or multi-stage heating and cooling systems. Designed for easy installation in 15 minutes or less and provides a simple user-friendly display with a dual scale (F + C).


  • Easy to install and use
  • Compatible with heat only systems
  • Economy model - simple, worry-free operation
  • Mounting hardware and wall plate included
  • Mercury free


MFR: YCT33A1000
SKU: 42779483
UPC: 085267262439
Brand: Honeywell
Attachments: Manuals,