9 Best Two Wire Heat Only Thermostats (October 2026)
The best two wire heat only thermostats include the LUX PSD010B Non-Programmable 2-Wire Heat-Only Thermostat for simple heat-only systems, the Suburban 161154 Wall Thermostat for a Suburban RV setup, and the White-Rodgers Emerson M30 White Heat-Only Thermostat for 24V mechanical control.
On this page (5 sections)
The best 2 wire thermostat heat only choice depends on system voltage and heater type. For a simple heat-only replacement, start with the LUX PSD010B.
For electric baseboards, choose a line-voltage thermostat that matches the circuit and wiring.
Two wires alone don't guarantee compatibility. A low-voltage furnace control and a line-voltage baseboard control can both have two wires, but they serve different circuits.
For a broader shortlist, compare our best heat only thermostat options. For baseboard systems, see our guide to the best thermostat for electric baseboard heater.
Our picks at a glance
-
1
Best for simple heat-only systemsLUX PSD010B Non-Programmable 2-Wire Heat-Only Thermostat
9.7/10 our score
See it on Amazon -
2
-
3
Best for 24V mechanical controlWhite-Rodgers Emerson M30 White Heat-Only Thermostat
9.5/10 our score
See it on Amazon
- 4
Check itHoneywell Home Digital Non-Programmable Thermostat for Electric
Best for two-wire electric baseboards - 5
Check itYeloDeer 2 PCS 240V Only 4-Wire Manual
Best for a 240V baseboard replacement - 6
Check itHoneywell TH1100DV1000 Pro-Digital 2-Wire Heat Only
Best for a readable digital display - 7
Check itWhite-Rodgers Mechanical Heat Only Thermostat
Best for single-stage heat - 8
Check itHoneywell Home CT87K1004 The Round Heat Only
Best for a familiar dial - 9
Check itROBERTSHAW 802 Line Voltage Thermostat with Double-Pole
Best for compatible line-voltage heat
Which two wire heat only thermostats fit different systems?
The best fit depends on whether your system is low voltage, an RV system or electric line voltage. Match the thermostat to the equipment and wiring before comparing display or control style.
LUX PSD010B Non-Programmable 2-Wire Heat-Only Thermostat: Best for simple heat-only systems
- Designed for 2-wire heat-only systems
- Battery powered
- Illuminated display
Designed for heat-only systems such as fireplaces, stoves and in-floor radiant heat. Battery power and an illuminated display suit a straightforward replacement.
Pros
- Designed for heat-only systems
- Battery powered
- Illuminated display
Cons
- Not programmable
- Confirm compatibility with your existing system
The LUX PSD010B is designed for heat-only systems such as fireplaces, stoves and in-floor radiant heating. It runs on 2 AA batteries and has an illuminated display.
It doesn't require a fan switch.
The push-button control keeps adjustments simple. It's non-programmable, so choose it when you want a basic temperature setting rather than a schedule.
Before replacing a thermostat, confirm that your system is compatible with this model and that the wiring matches. A two-wire appearance alone doesn't confirm the voltage or equipment type.
Choose it for a basic heat-only system where battery power and a readable display are useful. For a brand-specific comparison, see our best Honeywell 2 wire thermostat heat only picks.
Suburban 161154 Wall Thermostat: Best for a Suburban RV setup
- Heat-only wall thermostat
- Wall mount
- Suburban brand
A heat-only wall thermostat from Suburban that may suit an RV system designed for this model. Verify the system match before replacing a control.
Pros
- Heat-only design
- Wall mounted
Cons
- System compatibility needs confirmation
- Wire count and voltage aren't specified
The Suburban 161154 is a heat-only wall thermostat from Suburban. It's intended to control an RV water heater from inside the RV, and the provided product information doesn't specify its wire count or voltage.
For a replacement with three conductors, see our three-wire RV thermostat guide.
Treat this as a model-specific replacement candidate. Compare the old thermostat's model number and the RV system documentation before ordering, especially if the existing wiring isn't clearly identified.
Choose it for a compatible Suburban RV system, not as a general-purpose two-wire replacement. Our guide to a smart thermostat for RV covers other RV control considerations.
White-Rodgers Emerson M30 White Heat-Only Thermostat: Best for 24V mechanical control
- 24V
- Mechanical snap-action
- Heat only
This 24V mechanical heat-only thermostat is a possible fit for a compatible low-voltage system. Confirm the voltage and wiring before choosing it.
Pros
- Heat-only control
- Mechanical operation
- Wall plate
Cons
- Not programmable
- Only suitable for compatible 24V systems
The White-Rodgers Emerson M30 is a 24V mechanical snap-action thermostat for heat-only use. Its stated voltage makes it a candidate for a compatible low-voltage system, not an electric baseboard circuit.
The mechanical control and wall plate keep the setup straightforward. Check the current thermostat and heating equipment for a 24V rating before choosing it, and confirm that the system uses heat only.
If your equipment has staged heating, a single heat-only control may not provide the control it needs. Read [What Is a Two Stage Thermostat?
What You Need to Know](/what-is-a-two-stage-thermostat/) to understand the difference.
Choose it for compatible 24V heat-only equipment where mechanical control is preferred.
Honeywell Home Digital Non-Programmable Thermostat for Electric: Best for two-wire electric baseboards
- Two-wire non-polarized connection
- 120V or 240V line voltage
- Silent TRIAC switching
Made for electric baseboards and convectors on 120V or 240V line voltage. Its two-wire non-polarized connection does not make it interchangeable with a low-voltage thermostat.
Pros
- Designed for electric baseboards and convectors
- Silent switching
- Digital controls
Cons
- Cannot be used with a fan-forced convector
- Not for low-voltage heating systems
The Honeywell Home Digital Non-Programmable Thermostat for Electric is built for 120V or 240V electric baseboards and convectors with a two-wire non-polarized connection. This is a line-voltage thermostat, so its wiring and application differ from a low-voltage furnace control.
It uses TRIAC switching for silent operation and has an on-screen heating power indicator. The stated minimum load is 200W at 240V, and it cannot be used with a fan-forced convector.
Check the heater's voltage and load before choosing it. If you're considering other baseboard controls, our best thermostat for electric baseboard heater guide explains what to compare.
Choose it for a compatible electric baseboard or convector when the line voltage and minimum load match.
YeloDeer 2 PCS 240V Only 4-Wire Manual: Best for a 240V baseboard replacement
- 240V electric heat
- Manual, non-programmable control
- Two thermostats
A two-pack of manual electric baseboard thermostats for 240V systems. The product is described as a four-wire system, so compare its wiring with your heater before buying.
Pros
- Two thermostats in the pack
- Manual dial control
- Designed for electric heating
Cons
- Four-wire configuration
- Confirm the voltage and wiring
The YeloDeer two-pack is a manual electric baseboard thermostat option described for 240V systems. Its product information specifies a four-wire configuration, so it isn't a direct match for every two-wire installation.
It has a dial, indicator lights and a stated 40°F to 80°F control range. Compare the wiring and voltage at your heater with the thermostat's requirements before choosing it, and arrange professional help if the circuit is unclear.
The pack contains 2 thermostats, which may suit a home replacing controls in more than one compatible heating zone. Don't assume that the stated 240V option applies to every configuration described.
Choose it for compatible 240V baseboard systems where a two-pack and manual dial are useful.
Honeywell TH1100DV1000 Pro-Digital 2-Wire Heat Only: Best for a readable digital display
- 2-wire heat-only model
- Backlit display
- Battery powered
A battery-powered digital heat-only thermostat with a backlit screen that shows ambient temperature. Check that its wiring and system type match your existing control.
Pros
- Backlit display
- Shows ambient temperature
- Adjustable temperature scale
Cons
- Not programmable
- Compatibility still depends on the existing system
The Honeywell TH1100DV1000 is a battery-powered digital thermostat for heat-only use, with a backlit display that shows ambient temperature. Its adjustable scale runs from 40°F to 90°F.
The screen can make the current room reading easier to see than a manual dial. It's non-programmable, so it suits buyers who want a digital readout without scheduled settings.
Confirm that the existing system is compatible and that its wiring matches this model. For a programmable alternative, compare our best 2 wire heat only programmable thermostat guide.
Choose it for a readable digital display on a compatible heat-only system.
White-Rodgers Mechanical Heat Only Thermostat: Best for single-stage heat
- Single-stage heat only
- Mechanical control
- 50°F to 90°F range
A mercury-free mechanical option for single-stage heat-only systems. Confirm your system is compatible with its low-voltage design.
Pros
- For single-stage heat only
- Mercury-free
- Includes mounting hardware
Cons
- Not programmable
- Temperature range starts at 50°F
The White-Rodgers 1C20-102 is a mercury-free mechanical thermostat for single-stage heat-only systems. It has a 50°F to 90°F temperature range and an adjustable heat anticipator.
That system type matters because this model is intended for single-stage heat. The package includes mounting hardware, and an optional wall plate is available for covering marks left by an old thermostat.
Confirm the low-voltage system compatibility before buying. For more brand options, see our best Honeywell heat only thermostat roundup.
Choose it for compatible single-stage heating and a manual mechanical control.
Honeywell Home CT87K1004 The Round Heat Only: Best for a familiar dial
- Manual heat-only control
- Round dial design
- Decorative cover ring
A manual heat-only thermostat with a round dial and a cover ring that hides wall marks. Check its wiring and system requirements before replacing an existing thermostat.
Pros
- Simple twist control
- Cover ring hides wall marks
- Mercury-free
Cons
- Not programmable
- Confirm compatibility with your system
The Honeywell Home CT87K1004 uses a round dial for manual heat-only control. Its decorative cover ring can hide wall marks, and Honeywell Home gives a stated temperature-control precision of plus or minus 1°F.
The twist control avoids menus and screens, but it doesn't provide a programmable schedule. Check the system type and wiring before replacing your thermostat because its round shape doesn't determine electrical compatibility.
This option suits a compatible system where simple manual adjustment matters more than digital features. It is also part of the wider best Honeywell heat only thermostat comparison.
Choose it for a manual dial on a compatible heat-only system.
ROBERTSHAW 802 Line Voltage Thermostat with Double-Pole: Best for compatible line-voltage heat
- Line-voltage heat only
- Double-pole switch
- 120V, 240V or 277V rating
A double-pole line-voltage control for compatible electric heating systems. Its rating and wiring differ from low-voltage two-wire thermostats, so verify the circuit first.
Pros
- Double-pole switch
- Broad voltage rating
- Positive-off control
Cons
- Line-voltage wiring requires a matching system
- Not a low-voltage replacement
The Robertshaw 802 is a double-pole line-voltage thermostat for compatible electric heat. Its stated electrical rating covers 120V, 240V and 277V circuits, with a 50°F to 90°F control range.
This is not a low-voltage thermostat. Check the circuit rating, pole configuration and installation requirements before choosing it, and use a qualified professional if you're unsure about line-voltage wiring.
Its positive-off setting can shut down the heating system, and its vertical display shows the comfort level. Those features are useful only when the thermostat is an electrical match for the heater.
Choose it for compatible line-voltage heating that calls for a double-pole control.
How do you choose a two-wire heat-only thermostat?
Choose by voltage, heater type and wiring first, then compare controls and power needs. Wire count is only one part of the compatibility check.
If your equipment is a heat pump and you prefer a mechanical control, see mechanical thermostats for heat pumps.
Start by identifying whether the existing thermostat controls low-voltage equipment or an electric baseboard circuit. Check the model number, system manual and circuit information instead of relying on wire colors alone.
Next, confirm the system type. A heat-only thermostat isn't automatically suitable for a heat pump, two-stage equipment, fan-forced convector or RV system.
Then compare practical features. Battery-powered models can avoid a common wire, while line-voltage controls are designed for specific electric heating circuits.
A backlit display helps with visibility, and a programmable model can suit a household that wants scheduled changes.
For heat pumps, use the heat pump thermostat guide to identify the control needs before choosing a heat-only model.
Can a two-wire thermostat work with electric baseboard heat?
Yes, but only when it's a line-voltage thermostat made for the baseboard circuit. The Honeywell Home Digital Non-Programmable Thermostat for Electric is designed for 120V or 240V electric baseboards and convectors, while the YeloDeer option is described as a four-wire 240V control.
Check the heater's voltage and load, then compare the thermostat's wiring diagram with the existing setup. The Honeywell model has a 200W minimum load at 240V and isn't suitable for a fan-forced convector.
Don't replace a low-voltage thermostat with a line-voltage model because both appear to have two wires. If the circuit is unclear, have a qualified electrician identify it before installation.
Are all two-wire heat-only thermostats interchangeable?
No. Two wires don't tell you whether a thermostat is low voltage or line voltage, and they don't confirm whether the system is single-stage, RV-specific or designed for a particular heating appliance.
Use the equipment manual and thermostat model number to confirm compatibility. If you're comparing a Honeywell replacement, our Honeywell two-wire heat-only thermostat guide focuses on that brand's options.
Which two-wire thermostat should you choose?
Pick the LUX PSD010B for a simple compatible heat-only setup, the Honeywell Home Digital Non-Programmable Thermostat for Electric for matching electric baseboards, and the Honeywell TH1100DV1000 if a backlit digital readout is your priority. Confirm the system voltage and wiring before choosing any two-wire heat-only thermostat.
Our top 3 picks at a glance
-
1
Best for simple heat-only systems
LUX PSD010B Non-Programmable 2-Wire Heat-Only Thermostat
9.7/10 our score
See it on Amazon -
2
-
3
Best for 24V mechanical control
White-Rodgers Emerson M30 White Heat-Only Thermostat
9.5/10 our score
See it on Amazon
Frequently asked questions
What does a two-wire thermostat control?
A two-wire thermostat can switch a heat-only circuit, but wire count alone doesn't identify the system voltage or heater type. Check your thermostat model, system documentation and wiring before choosing a replacement.
A two-wire low-voltage control and a two-wire line-voltage control aren't interchangeable.
Can I use a two-wire thermostat on electric baseboard heat?
Yes, if the thermostat is made for your baseboard system's line voltage, wiring and load. The Honeywell Home Digital Non-Programmable Thermostat for Electric is designed for 120V or 240V electric baseboards and convectors with a two-wire non-polarized connection.
It cannot be used with a fan-forced convector.
Do two-wire heat-only thermostats need batteries?
Some do. The LUX PSD010B uses 2 AA batteries, and the Honeywell TH1100DV1000 uses 2 AAA batteries.
Other thermostats may draw power from the heating circuit or use line-voltage wiring.
Check the model's power requirements before installation.
How do I know if my thermostat is low voltage or line voltage?
Use the thermostat model number and heating system documentation to identify its voltage. Line-voltage thermostats for electric baseboards are designed for circuits such as 120V or 240V, while low-voltage controls use a different system.
If the wiring or voltage is unclear, ask a qualified HVAC or electrical professional to identify it.
