Easy to install and use, dual temperature scale (F/C).
Snap Acting Switch (Magnetic Switch) does not require leveling.
Bimetal temperature sensor.
Economy Model - Simple, worry-free operation.
Mounting hardware and wall cover included, hides marks from previous thermostat.
Compatible with 750 mV heating only systems - forced air (gas, oil & electric) and hot water/steam.
NOT compatible with electric baseboard heat (120-240 V), heat pumps or multi-stage heating/cooling.
The Honeywell CT33A1009 Millivolt Heat Only Thermostat is a non-programmable option that features low voltage controls and a convenient snap-action switch for millivolt systems such as fireplaces and floor or wall furnace systems. Incredibly easy to install, this manual thermostat includes mounting hardware and wall plated positions that make it extremely versatile for any number of positions. This Honeywell non-programmable thermostat is mercury free and designed specifically with the consumer in mind. Devoid of any traces of mercury and relatively simple to install, this non-programmable thermostat is easily read and even easier to adjust.
The Honeywell CT33A Thermostat is compatible with 750 mV heating only systems - forced air (gas, oil & electric) and hot water/steam.
Product Dimensions (WxDxH): 3.12 w x 0.88 x 3.12 in.
works very well, and was used to replace a multipurpose thermostat that would not turn on gas fireplace
Happy Home Owner
Reviewed: 11/27/2019 by buster sontag
Soooooo glad to get the correct part for my ancient floor furnace. Everyone , box store Pros swore the 24V to millivolt would work. I researched what I needed on the Honeywell site, had it shipped to my home, installed it and we have a happy Warm house again. Thanks Honeywell !
Used with Natural Gas Stove
Reviewed: 11/25/2018 by James ONeill
Perfect product for my Natural Gas Stove. Replaced the original on/off wall switch with this unit. Nice appearance, simple installation and appreciated the large back plate to keep the wall clean.
Reviewed: 11/21/2018 by doris kubinski
Very good and easy to install
Reviewed: 10/29/2018 by Timothy Noonan
Prompt delivery. Does the job.
Reviewed: 12/01/2017 by Bill Lunn
Reviewed: 10/25/2017 by James Eggeling
Finally found the product I needed! Service was stellar and at a great price. Kept me informed on product shipment with emails and I received it when it was expected! Keep up the good work!
Reviewed: 11/16/2016 by Rory Lovelace
Truly excellent product. Very easy to install. Works flawlessly and completely accurate with heat settings.
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