10 best two wire thermostats

Product description

Features:

Backlit display is easy to read

Displays ambient (measured) temperature at all times

One-touch access to setpoint temperature

Built-in compressor protection.

Please note: Make sure heating and cooling temperatures are set to acceptable ranges:

Heat: 40° to 90°F (4.5° to 32°C).

• Adjustable Temperature Scale: Standard Selection Of 40 To 90F
• Backlit Display Is Easy To Read
• Displays Ambient (Measured) Temperature At All Times.
• Brand Name: Honeywell
• Power source type: Battery Powered

User questions & answers

Question:	Does this have an on-off switch
Answer:	This is just a simple thermostat that turns on when the temperature reaches the point at which you set it, and stays on until the temperature drops below that set point.
Question:	Will this unit operate on a 12 volt RV electrical system without the aaa batteries installed? Will the display be readable
Answer:	This means do not connect a variable speed control to the motor. The motor must run at full speed and only controlled by the thermostat.
Question:	Can this be used for Gas Fireplace
Answer:	Come on. At temperature range 60° to120°, you set the "fan on" to cool your whatever. HOWEVER! YOU DO NOT WANT your house fan on if there is a FIRE as it will create a chimney effect and make things exponentially worse so at 183° just before where stuff like wood starts to oxidize and combust (burn), it shuts off so you don't blame (and sue) them because YOU left a romantic candle burning and toasted your bedroom.
Question:	Are you able to set the min and max temps, like a min of 50 degrees and max of 68 degrees
Answer:	As the temperature increases in the attic the contact closes and the fan starts. So far mine works fine.

Product description

The Honeywell Home CT50K1002 Standard Heat Only Manual Thermostat can be used with Central Gas or Oil Heating systems. Features: Quiet Switching, Heat Only, 2 Wires and Mercury Free.

From the Manufacturer

The Honeywell Home CT50K1002 Standard Heat Only Manual Thermostat can be used with Central Gas or Oil Heating systems. Features; Quiet Switching, Heat Only, 2 wires and Mercury Free.

• Quiet Switching
• Heat only
• 2 wires
• Mercury Free
• Compatible with central gas or oil heating

User questions & answers

Question:	My home is old. from 1930. i have a oil bolier. use this to heat home for winter, and to have hot water. can this be used, for my home
Answer:	I used mine to control one of the zones on my gas-fired hot water heat boiler. It was a two-wire installation. You might check the back of your existing thermostat to see how many wires go to it. If it is two-wire, it should work.
Question:	Is this thermostat compatible with a multivolt system? (Yes, multivolt
Answer:	Hi there, the CT50K thermostat works with 24 VAC systems. - Maria
Question:	Will this work with gas furnace from1960s controlled by old itt thermostat (model #t80bv100j) that says "for use with millivolt 12vdc/24vac .06 amps
Answer:	I'm using it on a gas fireplace with low voltage wiring, so I would think it would work. I have to say, though, that these things don't last very long. We have ours in use perhaps 6 months during the day (at best,) and after about two years they need fiddling to activate flames. Something in the switches loses sensitivity - I know, not real scientific. When this third one I've bought finally craps out, I'm seeking a different make and model. Too bad ... it looks so nice and unobtrusive on the wall
Question:	can a double pole thermostat be used where a single pole was installed
Answer:	Yes just hook your poles up in parallel.

Product description

The Emerson 1E78-140 single stage thermostat has an easy to read digital display. This non-programmable thermostat works with most single stage heat only systems. Is for use on 24 volt and millivolt systems. Not compatible with electric baseboard heat and some other systems.

• Easy-to-read digital display with backlight
• Non-programmable thermostat
• Compatible with single stage heat only systems
• Precision control of plus/minus 1 degree F
• Vertical profile. Thermostat Compatibility-Baseboard Heater

User questions & answers

Question:	Will this work with a Cozy gas wall heater that uses 2 wires
Answer:	The thermostat ranges from 40 (low) to 80 (high)
Question:	I followed the instructions to turn the backlight on. it worked first day but then stopped working. so i followed instructions again. why it stopped
Answer:	Hello, for this Stroller Fan，the volts is 3.6V 5W. You can use the Clip On Fan by the 2200mAh lithium battery or the USB cable. If further question, please feel free to contact us through Buyer-Seller Messaging: https://www.amazon.com/ss/help/contact/?_encoding=UTF8&marketplaceID=ATVPDKIKX0DER&ref_=v_sp_contact_seller&sellerID=AVKPYQ121BJBZ Have a nice day. Cambond Customer Service Team
Question:	can i use it in an rv with a 12 (2 wire) volt system
Answer:	Hello, this unit doesn't need a rechargeable battery charger, the battery can be charged via the usb cable. And the 2200mah lithium battery is not equivalent to a aa. It is a 18650 lithium rechargeable battery. If further question, please feel free to contact us through Buyer-Seller Messaging: https://www.amazon.com/ss/help/contact/?_encoding=UTF8&marketplaceID=ATVPDKIKX0DER&ref_=v_sp_contact_seller&sellerID=AVKPYQ121BJBZ Have a nice day. Cambond Customer Service Team
Question:	Does the display light up as shown in the description? That would make it easier to read
Answer:	No, the battery it comes with is the only battery that will only fit in the fan. The fan works great, but I was disappointed that I wouldn't be able change out the battery once it died. Luckily i opened it up before our trip and noticed. Before our trip I bought a rechargeable battery pack to recharge the fan. :D

• Easy Programmable mode ensures the desired temperature is reached by the programmed time, making for a comfortable home whenever you need it.
• Separate 5-day (weekday) and 2-day (Saturday/Sunday) programming with four separate time/temperature periods per day,to reduce energy usage.
• Easy to read in large dispay,OPTIONAL 2 “AAA” Batteries provide continuous temperature display during power loss.Low Battery Indicator available.
• Compressor short cycling protection,1 heating, 1 cooling and heat pumps without auxiliary heat, Does not work with electric baseboard heat (120-240V).Detailed instructions for easy installation,C-wire needed for proper installation. Note-c wire is required and is the primary power source for your thermostat. Without a c wire, your thermostat will not power up, In the case of battery power, there is no need to connect the C wire.
• Accurate temperature control of +/-1-Degree F for consistent comfort, Detailed instructions for easy installation, 12 or 24 hour clock.

User questions & answers

Question:	Will this work with 2 wire system? my heat/ac system works on what they call a heat only system, you switch from heat to ac at furnace
Answer:	Dimensions are 13”x13.2” , the adhesive pages are 10.8" x 12.8".
Question:	Does this work with electric baseboard
Answer:	It fits 2 by 6 photo strips. Two slide-in pockets on each page. Perfect for 2x6 photo booth pictures.
Question:	I am replacing a Robershaw 500-407 millivolt with 2 wires for my fireplace. Will this thermostast be compatible
Answer:	The pages are not removable
Question:	Does this have a separate " heat, cool, off" switch
Answer:	It's just white plastic, so I imagine you could write or glue whatever you want on it.

• Multi stage, 2 heat/2 cool, 5-1-1 Day Programmable, Intuitive wake, leave, return, sleep programming icons.
• Compatible with 2 heating, 2 cooling and heat pumps without auxiliary heat. Does not work with electric baseboard heat (120-240V).
• Electric or Gas configurable, Accurate temperature control of +/-1-Degree F for consistent comfort, make comfortable temperatures to reduce energy usage, savings on annual heating and cooling costs.
• Dual-powered (battery and/or hardwire 24Vac power), Easy access battery compartment.
• 4.5 sq. inch display with white backlight, Easy-to see and read. large, clear backlit digital display, with air filter change reminder and low battery indicator available. With 5-year warranty.

User questions & answers

Question:	This product says it is corded. Does thst mean it has to be plugged into an outlet
Answer:	I don’t remember, it was such a piece of junk I threw it out.
Question:	Heagstat h725. is the swing plus or minus the set temp? for heating example: set temp 70. swing +/-1. heatpump doesn't shut off till reaches
Answer:	The black album has black pages.
Question:	How to change to regular time? The previous question and answer is not correct
Answer:	There are not, each page is just just two vertical sleeves along the outside edge and three horizontal sleeves along the inside edge. No room for anything else
Question:	Maybe I overlooked it, but does this have a feature that turns in on automatically at a specific time and temp" Does it have a "Keep" temp feature
Answer:	No, this is a bound album, not a binder.

Product features

This is a 24VAC low-voltage and millivolt system 5-1-1 day programmable thermostat for room use

Heagstat specializes in the design and manufacturing of professional grade products that improve the comfort of a home and simplify the installation. The H715 is low voltage multi stage thermostat, a simple, easy to use 1-week(5-1-1 Day) programmable thermostat. You set it up to adjust the temperature when you are away or asleep-times when you don't necessarily need to heat or cool your home to optimum comfort-and your HVAC equipment runs less. Plus, your heating or cooling comes back to the comfort level you desire before you come home or wake up.

The programmable thermostat that offers unparalleled comfort, control, and savings

• 5-1-1 Day Programmable (Weekday, Saturday and Sunday)
• Easy menu driven programming
• Intuitive wake, leave, return, sleep programming icons
• Save Energy and Money

This saves you energy and money without sacrificing the comfort of your home

Specifications:

• Multi Stage
• 2 Heat, 2 Cool
• 4.5 sq. inch large LCD display with white backlight
• Easy access battery compartment
• Electric or Gas configurable
• Separate B & O terminals
• Separate heating and cooling swing (cycle rate)
• Air filter change indicator (selectable on or off)

• Low battery indicator
• Room temperature calibration adjustment
• 5 minute compressor delay protection (selectable on or off)
• Display options: Fahrenheit or Celsius temperature display, 12 or 24 hour clock

Easy to see and read

• 4.5 sq. inch large LCD display
• With white backlight

Easy to use and install

• Easy wire coded terminal blocks
• Terminal Designations: RH, RC, G, Y, Y2, C, O, B, W, W2
• Universal sub-base, mounts on wall or junction box
• Easy access battery compartment
• Dual-powered (AAA battery and/or hardwire 24VAC power)

What's in the box?

• Heagstat H715 Thermostat (Jumper wire connected)
• Two screws and anchors
• Operation Manual
• Installation Manual
• Cable Label

Product description

The ESP Electronic Programmable offers “Best In Class” 22Amp Max Rating for larger heating circuits. Featuring 7 individual day programmability for maximum temperature control; four time and temperature settings. 3 wire, line powered. Large back-lit display. This thermostat took years to develop and has become a popular model. All the features you want without too many buttons. Simple is always better. We have added backlighting to the full-size display and an on/off switch to control the illumination. On the front two simple buttons control the temperature up and down, while all the programming keys are hidden under the front cover, protected from wandering, unauthorized fingers. Comfort and convenience is always our primary goal at King.

From the Manufacturer

This King ESP230 series programmable thermostat took years to develop and has become one of our most popular models! Backlighting of the large LCD digital screen makes for easy viewing even across a room. Two simple buttons control the temperature (up or down) while all programming buttons are conveniently hidden underneath the front cover, protected fron wandering, unauthorized fingers. Programming allows even temperature control and potential heating cost savings of up to 15%! Built-in snap action relay. Electronically anticipated. Three wire installation. Meets most energy codes. Temperature range: 44 - 95 degrees Fahrenheit. 208/240 Volts, 22 AMP.

• Programmable (buttons under front cover)
• Large digital display with backlight
• Simple 2 button control of temperature
• Memory backup
• UL Listed

User questions & answers

Question:	Can this be set as low as 40 degrees
Answer:	The measurements are included when you compare traps.
Question:	Does the thermostat include a switch to turn the heater off
Answer:	No Sorry we do not ship this internationally.
Question:	We bought ours Sept 2019 and today it won’t kick the heat on & the black light won’t turn on either. Any recommendations
Answer:	For a smaller animal, we recommend a light trigger release setting. Place just the tip the of trigger rod under the door cross rod. Larger animals will need a heavier trigger release setting. Push the end of the trigger rod completely under the door cross rod.
Question:	Is it possible to order the connector needed to switch it from Celsius to Fahrenheit? It either fell off before arriving or during installation
Answer:	If you would have a larger size it would work. Coyotes hunt in packs so if you do use one make sure you cover outside of cage very well with grasses or branches. Use something with a strong odor for bait. Good luck.

Product description

Honeywell Home RLV4305A 5-2 Day Digital Programmable Thermostat for Electric Baseboard Heating - now with white backlit screen 1 setting for week and 1 setting for the weekend 4 programmable periods per day Silent switching for accurate temperature control Use with electric baseboards (120 240V) convectors and to wire radiant ceilings Compatible with fan forced heaters

• Separate programming for the weekdays and weekends; up to 4 program periods per day
• Saves energy with personalized temperature control
• Compatible with electric baseboards (120-240V), convectors, and radiant ceilings. Product dimensions (WxDxH):4.8 x 1.2 x 5 inches
• TRIAC silent switching for accurate temperature control of +/-0.5°F.Storage temperature:-4°F to 120°F (-20°C to 50°C)
• Fast, easy, two-wire installation. High capacity, up to 3,500 watts at 240 volts.

User questions & answers

Question:	how do you install with four wires/two hot two nuetral to the two wires on thermostat
Answer:	Yes, I have 20 yo boiler system and 2 wires is all you need.
Question:	buying this for a ski resort condo wher power outages are common and water pipes are prone to freezing. Will it automatically start after outages
Answer:	Yes it's a green display with black txt, just as the picture shows
Question:	How many watts is the Honeywell RLV4305A1000/E 5-2 Day Programmable Thermostat for Electric Baseboard Heaters good for
Answer:	http://yourhome.honeywell.com/en/products/thermostat/5-2-day-programmable-thermostat-rth2300b1012 is the location. Scroll down the page and look under resources.
Question:	Can this unit be set to allow a large temp. swing before turning on/off to maintain room temperature, rather than turning on/off every few seconds
Answer:	Updated link to the product manual:https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2448EF.pdfAs noted elsewhere, in a 2 wire case it will always be Red and White

Product features

5-2 Day Programmable Electric Heat Thermostat

This versatile thermostat with TRIAC switching features outstanding accuracy and a backlit display.

Advantages of TRIAC switching:

• 100% silent operation -- ideal even for bedrooms
• Unsurpassed temperature control eliminates temperature swings
• No temperature swings means you are comfortable at a lower setpoint
• Comfort at a lower setpoint saves money on heating bills

Easy to Use

• Backlit display for easy reading
• Instructions inside front panel enable quick programming
• Battery-free backup means no re-programming your schedule after power outage

Simple Installation

• 2-wire non-polarized connection means fast, hassle-free installation
• Temporary bypass enables temperature override without changing programming

5-2 Day Programmable

• 5-2 Day Programming allows for separate programs for the weekdays and weekends
  • 4 time periods per day
  • Pre-programmed or personalized schedules
  • Selectable 12 or 24 hour format

Electric Heat Only

Compatible with:

• Electric baseboards
• Convectors
• Fan-forced heaters

Also ideal for radiant ceilings

Product description

Orbit's clear comfort Pro THERMOSTAT combines all the features of a fully Programmable energy-saving THERMOSTAT with a contemporary design that looks great in any home. Full 7-day programmability eliminates the need for manual adjustments and allows for customization of heating and cooling with up to four periods per day. Power Requirements: 120V AC/60Hz Input 24V AC Output

• Beautiful and contemporary design complements any decor, with large display and warm backlight for easy viewing even from across the room
• Early start mode ensures the desired temperature is reached by the programmed time, making for a comfortable home whenever you need it
• 7-Day programmability: program each day individually with up to 4 programming periods. This thermostat is not compatible with base board heaters (or other line voltage heating), multi-stage heating or cooling systems, or 3-wire hydronic systems
• Copy feature (from day to day), as well as permanent and temporary hold mode, reduces programming time and makes it easy to use
• Accurate temperature readings - to +/- 1 degree in Fahrenheit and Celsius - for ultimate consistent control
• One-stage thermostat that works with gas, oil or electric furnaces, central air conditioners, 2 wire hot water systems, millivolt systems, central heating and cooling systems, and heat pumps without auxiliary/backup heat.

User questions & answers

Question:	Does this offer a "swing" setting that will undershoot or overshoot the set temp
Answer:	C wire not required, but your thermostat will be running off batteries
Question:	is the back light on all the time
Answer:	Yes, it will be manual until you enable and set up the Z wave on the thermostat.
Question:	does it need to be reprogrammed when the batteries are replaced
Answer:	If connected to zwave controller you can progam your heat to come on at any temp you select and program it to go off when it reaches your set point. I use this capability when basement drops to 35 degrees then heats to 40 and stops. Keeps pipes from freezing when house is not in use. You can trigger off a remote temp sensor also. Check thermostat temp range spec, not heating spec.
Question:	Is the font really large? i can't read below "10 pt"; prgramming is impossible on current model
Answer:	Did you leave it time to stabilize? Mine seems to be fairly accurate compared to a reference thermometer.

Product features

The Perfect Blend of Style and Function

When it comes to thermostats, consumers expect the very best in energy efficient technology and Orbit is listening.

The 7-day programmable Clear Comfort Pro thermostat feature a large, easy-to-read, backlit LCD screen that can be seen from across the room. The transparent faceplate provides a sleek design that enhances any living space.

With scheduling that allows for individually programming all 7 days of the week, with 4 periods a day, you have the control you need to save money and energy.

Copy and Paste

Orbit took steps to make programming your thermostat even easier with its unique copy feature. The copy feature streamlines programming and eliminates the need to enter redundant schedule times for multiple days of the week.

Easy to Use

With easy-to-use switches, simple fingertip temperature control, and quick programming buttons, the thermostat’s controls are not only easy to understand, but also simple to operate.

Save Energy and Money

For optimal energy savings, this thermostat is preprogrammed with Energy Star recommended settings for each day of the week. This saves you energy and money without sacrificing the comfort of your home. Use these recommended settings to save up to 33% off your energy bill.

• Easy Programmable mode ensures the desired temperature is reached by the programmed time, making for a comfortable home whenever you need it.
• Separate 5-day (weekday) and 2-day (Saturday/Sunday) programming with four separate time/temperature periods per day,to reduce energy usage,savings on annual heating and cooling costs.
• Easy to read in large dispay,OPTIONAL 2 “AA” Batteries provide continuous temperature display during power loss.Low Battery Indicator available.【IMPORTANT】 Currently does not support millivolt systems
• Compressor short cycling protection,1 heating, 1 cooling and heat pumps without auxiliary heat, Does not work with electric baseboard heat (120-240V).Detailed instructions for easy installation,C-wire needed for proper installation. Note-c wire is required and is the primary power source for your thermostat. Without a c wire, your thermostat will not power up，In the case of battery power, there is no need to connect the C wire.
• Accurate temperature control of +/-1-Degree F for consistent comfort, Detailed instructions for easy installation, 12 or 24 hour clock.

User questions & answers

Question:	Will this work on a carrier 52sqc514301rc? 20 year old a/c and heatpump
Answer:	It feels like a heavyweight cardboard composite. It comes with a removable plastic protective cover.
Question:	Will this t21stk-2 thermostat work with a millivolt system for a gas fireplace
Answer:	50-60 Sheets, but I think it will be too heavy
Question:	What is the lowest temperature this can be set to
Answer:	You can search "totocan refill pages" on amazon.
Question:	Does this work for hot water radiators that is fed from a boiler
Answer:	Yes. Both sides are usable. I'm going to get another of these because it's large enough to hold several photos on each page.

Product description

About the LUX TX500U Thermostat, 5-2 Day Digital Programmable Universal Smart Temp Are you looking for a simple way to save energy in your home? Now you can live a greener lifestyle by upgrading to the LUX TX500U Thermostat, 5-2 Day Digital Programmable Universal Smart Temp. This programmable thermostat is not only energy-efficient, but it is also extremely cost-effective and attractive, blending in seamlessly with the rest of your home. The LUX TX500U makes it easy to give you the warmth you want, whenever you want it, whether it is as you’re waking up in the morning or heading to bed at night. Don’t worry about this being a complicated device to operate—the large, lighted one-touch display on the device makes using the LUX TX500U a breeze! It is also extremely easy to install, making it the perfect choice for users everywhere. Need additional reasons to trust the LUX brand? The company has been manufacturing outstanding products for nearly a century, and the device comes with a three year limited from the manufacturer. This thermostat is not for use on electric baseboard heat (120\240 volt) and systems with 2-cooling stages

• Great for heating and cooling systems including single and multi-stage heat pumps
• Universal compatibility for all system types except electric baseboard heat
• Exclusive Lux speed slide for easy programming
• Separate weekday and weekend programs with 2 or 4 periods per day
• Large lighted one touch display

User questions & answers

Question:	Is this model compatible with a gas-fired boiler that produces hot water baseboard heating
Answer:	The T10-1141SA's lowest set point temperature is 50 degrees and if the room temperature drops below that setting yes the heater will come on. There is no OFF mode on this thermostat. LUX Technical Service
Question:	What does the "emer" button do
Answer:	No. It will not work with a 220V or a 110V heater. This is for low voltage 24VAC or 24VDC .
Question:	What version of this thermostat is Amazon currently shipping? I am looking for the version with the adjustable swing setting
Answer:	Yes the T10-1141SA has a trim plate included in the packaging. LUX Technical Support
Question:	Does the unit have a swing setting - so you can set the temperature ranges, or swings, between 1 or 2 degrees
Answer:	My system is a two-wire millivolt system. If your propane direct vent heater uses a millivolt thermostat this unit will work well.

Product features

Product Features

• Easy Installation
• Program 5/2-day or non-programmable
• Easy-view back light
• User option: 2 or 4 periods per day
• Keypad lock for unauthorized use
• Temporary override and manual hold
• Temporary compressor protection bypass