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  • Easy to install and use.
  • Snap Acting Switch (Magnetic Switch) does not require leveling.
  • Compatible with heat only systems.
  • Bimetal temperature sensor.
  • Economy Model - Simple, worry-free operation.
  • Mounting hardware and wall plate included.
  • Mercury Free.

Honeywell YCT33A1000 Millivolt Heat Only Thermostat Product Description

The Honeywell YCT33A1000 Milivolt 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 and featuring mounting hardware and wall plated options, this unit is extremely versatile and can be placed in any number of positions. The YCT33A1000 is mercury free and designed specifically with the consumer in mind. Devoid of any traces of mercury and relatively simple to install, this model is easily read and even easier to adjust. Honeywell has created the perfect solution for those searching for a highly responsive heat only thermostat that's renowned for its durability and accessibility.
Product Specs
UPC:
085267262439
MPN:
YCT33A1000
Category:
Thermostats
Product Manuals
YCT33A1000 customer reviews

Overall Rating

5
10 Reviews
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10 customers recommend this product
Honeywell YCT33A1000 Millivolt Heat Only Thermostat Reviews
John H
February 17, 2026
Verified Purchase
Just what I wanted and needed!

My programmable thermostat quit. I wanted a simple non programmable thermostat to replace it. This thermostat is just what I needed! Only two wires to hook up! Very easy! Remember to take plastic protector clip off when finished!

John M
November 3, 2021
Verified Purchase
Thermostat

It came in the mail in a timely manner and easy to install. Thanks.

JClyde E
October 18, 2021
Verified Purchase
ct33a 750 millivolt

I really like these simple to use non complicated thermostats. I would like them even better if they did not have an off position for millivolt use.

JClyde E
March 26, 2021
Verified Purchase
ct33a 750 millivolt

i love this thermostat because it does not have a heat anticipater. easy to install simple to operate.

Thomas Boniface
February 12, 2021
Verified Purchase
Solid product

Exactly what one would expect from Honeywell. Solid, sturdy, perfectly functional, with simple instructions.

steven magill
October 26, 2020
Verified Purchase
Keep it Simple

I needed a non-programmable heat only thermostat for a propane direct vent wall heater in a mountain cabin. Easy to hook up with just two wires and works fine.

Bryant Floyd
July 25, 2020
Verified Purchase

No more replacing batteries every again. Installation was a breeze. It is very simple to use.

Sal Pacifico
January 2, 2020
Verified Purchase

works very well, and was used to replace a multipurpose thermostat that would not turn on gas fireplace

buster sontag
November 27, 2019
Verified Purchase
Happy Home Owner

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 !

James ONeill
November 25, 2018
Verified Purchase
Used with Natural Gas Stove

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.

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