Honeywell Economy Millivolt Non-Programmable Thermostat-CT33A - The Home Depot


Model # CT33A

Internet # 203186978

Store SKU # 692666

Economy Millivolt Non-Programmable Thermostat

Honeywell Economy Millivolt Non-Programmable Thermostat

This item has been discontinued.
The Home Depot no longer carries this specific product.

$14.98 / each


Model # CT33A

Internet # 203186978

Store SKU # 692666

This Honeywell Economy Only Manual Thermostat features a simple analog presentation that is easy to understand. The thermostat allows you to simply adjust the temperature by moving the lever up or down. The thermostat is compatible with 750 millivolt systems to provide low-voltage control of heating equipment.

  • Economy eat only thermostat for 750 millivolt systems
  • Easy to install and use
  • Decorative backplate included to cover up wall marks
  • Dual temperature scale degree F/C


Assembled Depth (in.)  1.25 in  Assembled Height (in.)  3 in 
Assembled Width (in.)  3 in  Product Depth (in.)  1.25 
Product Height (ft.)  Product Width (in.) 
Color Family  Beige / Cream  Control Type  Lever 
Number of HVAC Zones  Operation Type  Mechanical 
Returnable  90-Day  Shape  Square 
Thermostat Features  No Additional Features  Thermostat Type  Heat Only 
Voltage (volts)  0.75 
Warranty / Certifications
Certifications and Listings  No Certifications or Listings  ENERGY STAR Certified  No 
Manufacturer Warranty  1 year limited warranty 


Rated 2.1 out of 5 by 7 reviewers.
Rated 3.0 out of 5.0 by Garage heat thermostat Simple, inexpensive, great for a garage heater. Don't, however, neglect to lift off the little cardboard protector over the contacts. With that shipping piece in place, the thermostat works erratically or not at all. Don't ask. The CT33 has an off switch at the extreme left lever position. Handy when the door is going to be left open for a couple of hours. December 23, 2014
Rated 5.0 out of 5.0 by Excelent buy This thermostat, is basic, and the price is right, it is just what was needed for the small heater in the living room. February 4, 2015
Rated 1.0 out of 5.0 by Worked well for only 4 hours, I'm very disappointed! The first 4 hours it worked well when I set it at 65 degrees. It would come on and then turn off and keep the temperature between 64-66 degrees. Then after 4 hours, it wouldn't turn back on again!!! No matter what degree I set it at, I had to turn it on and off manually!!!! Don't know why it is sticking and won't turn on and off at a set degree by itself? I bought this for my gas fireplace to replace the off and on switch. Now I'm right back where I started with this thermostat being an off and on switch! What a joke this thermostat is! Wasted my time and money! Now I got to buy a higher quality one since this one is defective! January 17, 2014
Rated 1.0 out of 5.0 by Bad Oriduct It is a bad product. It didn't work at all and I am returning it. I fell for the low price of $15. It seems that the temperature gauge is malfunctioning. I after it didn't work I installed Williams Thermostat which worked fine. It was for $25 but worth the price. Home Depot sell William furnaces but not the thermostats. I wonder why not? By the way I am a licensed plumbing contractor. December 15, 2014
Rated 1.0 out of 5.0 by Save yourself time and frustration Normally I refrain from negative/poor reviews of anything. No need to vent or add to an already angry world. However, I'm passing along that this product is horrible. Just like the other reviews say here, this thermostat is useless. I installed this for our gas fireplace and after only 4 uses, it stopped working. Shuts off after only minimal use and won't fire up again. Complete waste of time and money. Going to find a much more reliable product. Save yourself and steer clear of this thermostat. November 22, 2014
Rated 1.0 out of 5.0 by poor didn't work out of the box...had to get a working model from an hvac friend and had to waste my time returning it back...pretty sad when it doesn beyond poor...didn't work out of the packet...wasted time on a product that was shipped not in working order November 11, 2014
Rated 3.0 out of 5.0 by Good basic thermostat but no thermometer I needed this to replace an older model. This is a good value replacement, but it does not have a thermometer. It appears in the pix to have one, but that is just the red line connected to the temperature control. So I took it back. January 22, 2013
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