Ask Mylow

Mylow is an AI virtual assistant.

More Information

Is it easy to install?Can I use it with hot water?What is the warranty period?Does this work with gas heating?Will this control my warm air furnace?

Honeywell Home CT30A Heat Only 24-Volt Mechanical Non-Programmable Thermostat

Name: Honeywell Home CT30A Heat Only 24-Volt Mechanical Non-Programmable Thermostat
Brand: Honeywell Home
SKU: 5015110497
Price: 23.98 USD
Availability: InStock
Rating: 4.1 (73 reviews)

Shop Honeywell Home

4.1

Pickup

Unavailable

Shipping

Thu, Sep 3

65 available

Delivery

Unavailable

Stepper number input field with increment and decrement buttons

Members save more.

Here are some similar items...

Honeywell HomeX1N 24-Volt Electronic Non-Programmable Thermostat Single-Stage Heating and Cooling

165

Honeywell HomeCT410B 24-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Honeywell HomeCT87K Round Heat Only 24-Volt Mechanical Non-Programmable Thermostat

Honeywell HomeRLV3150A 24-Volt Electronic Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Honeywell HomeX1N 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling

165

Honeywell HomeRTH111B 24-Volt Electronic Non-Programmable Thermostat Single-Stage Heating and Cooling

331

Honeywell HomeCT31A Heat/Cool 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling

Stelpro240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Honeywell HomeRLV3120A 24-Volt Electronic Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Honeywell HomeCT87N Round Heat/Cool 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling

CadetT521w 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

CadetBtf 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

CadetCom-Pak 240-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling

CadetBtf 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

CadetT522-W 120-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Price Guarantee

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

Return Policy

FREE Shipping

Delivery is on us for orders over $45. Some exclusions apply.

Shipping Details

This Honeywell Home economy heat 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 oil or gas heating systems to provide low-voltage control of heating equipment. It comes with mounting hardware (wall plate included) and does not require leveling. This thermostat is not compatible with electric baseboard heat, heat pump systems, or multi stage heating/cooling systems.

Compatible with oil or gas heating systems to provide low-voltage control of heating equipment
Snap acting switch (magnetic switch) does not require leveling and is mercury-free
Bimetal temperature sensor offers simple and hassle-free operation
Simple, worry-free operation
Comes with mounting hardware (wall plate included)

General
Shape	Square	Heating Only	Yes
Type	Thermostat	Cooling Only	No
Display Type	Analog	Temperature Displayed	Current and setpoint/desired temperature
Series Name	CT30A Heat Only	Switching Mechanism	Mechanical
Wiring Type	2-wire

Dimensions
Depth (Inches)	0.88	Width (Inches)	3.12
Height (Inches)	3.12

Features
Voltage (Volts)	24	High/Low Desired Temperature Limits	No
Auto System Change from Heat to Cool	No	Single-Stage Heating and Cooling	No
Backlit Display	No	Multi-Stage Heating and Cooling	No

Compatibility
Compatible with Warm Air Furnace	Yes	Compatible with Steam or Gravity	Yes
Compatible with Central Air Conditioning	No	Use with Electric Baseboard 120V-240V	No
Compatible with Heat Pump (No Aux./EM)	No	Use with Floor/Wall Furnace 24V or 750mV	Yes
Compatible with Heat Pump (With Aux./EM)	No	Use with Volt Gas Fireplace 24V or 750mV	Yes
Compatible with Hot Water	Yes	Use with Pellet Stove for mV Thermostats	No

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	UL safety listing

Warranty
Warranty	1-year limited

Miscellaneous
UNSPSC	41112200

Check out the Best Selling Non-Programmable Thermostats on Lowes.com

Review

4.1 out of 5

73 Reviews

78% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The basic heat-only thermostat has a mixed reception. Many found it easy to use with features like manual operation and no need for batteries. However, some reported issues like the thermostat being defective, having a short lifespan, and not working properly. The consensus is that it can work well for basic heating needs, but may not be as reliable or long-lasting as more premium options, and customers should be prepared to potentially replace it more frequently.

Customer review summary generated by AI, including incentivized reviews.

73 Customer Reviews

Sort By

Honeywell Quality

Would Recommend

Honeywell had always been the standard to beat.

stewartAugust 4, 2026

Was this Review Helpful ?

Easy to install

Would Recommend

Simple enough for tenant to use

May 21, 2026
Verified Purchaser

Was this Review Helpful ?

Thermostat For A Unique Application

Would Recommend

Exactly the thermostat for our unique application.

May 21, 2026
Verified Purchaser

Was this Review Helpful ?

Thermostat is for controlling heat only

Would Recommend

I wanted the most basic thermostat and found this Honeywell HEAT ONLY 24-volt mechanical thermostat. Mission accomplished.

BeauApril 30, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/f5129cbf-6964-52c8-8e01-f93ecdf19226

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/2447d1b7-a794-50ea-94fe-7f0a4d2c879a

Was this Review Helpful ?

Bargain

Would Recommend

Easy to install

Jake stuffApril 17, 2026
Verified Purchaser

Was this Review Helpful ?

don't buy

cheep junk

ray fMarch 25, 2026
Verified Purchaser

Was this Review Helpful ?

Response from Resideo Team

Hi ray f, we are sorry that you feel this way. We will be happy to get the details about what you are experiencing with the thermostat and help makin...

Resideo TeamMarch 27, 2026

resideo

Simple thermostat, easy to install

Would Recommend

Easy to install, works great. Installed as backup to a smart thermostat

MaxiHeatMarch 8, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

5 Questions

Read All Q&A

Sort By

Honeywell Home: Featured Videos

COMPARE PRODUCTS

		Name	Current Item Honeywell HomeCT30A Heat Only 24-Volt Mechanical Non-Programmable Thermostat
		Ratings	73
		Voltage (Volts)	24
		Temperature Displayed	Current and setpoint/desired temperature
		Backlit Display
SUPCOCTC 24-Volt Mechanical Non-Programmable Thermostat	Honeywell HomeRTH111B 24-Volt Electronic Non-Programmable Thermostat Single-Stage Heating and Cooling	Honeywell HomeX1N 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling	Honeywell HomeCT31A Heat/Cool 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling	Honeywell HomeCT87K Round Heat Only 24-Volt Mechanical Non-Programmable Thermostat	Honeywell HomeRLV3120A 24-Volt Electronic Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	Honeywell HomeCT87N Round Heat/Cool 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling	Honeywell HomeRLV3150A 24-Volt Electronic Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	CadetT522-W 120-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V
2	331	165	16	42	64	30	40	26
24	24	24	24	24	24	24	24	120
Current and setpoint/desired temperature	Current room temperature	Current and setpoint/desired temperature	Current and setpoint/desired temperature	Current and setpoint/desired temperature	Current room temperature	Current and setpoint/desired temperature	Current and setpoint/desired temperature	Current and setpoint/desired temperature
		Yes (motion activated)					Yes (always on)