BTF2 thermostat on baseboard heater

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Model # CT410B Internet #100574426 Store SKU #129002
Honeywell Manual Electric Baseboard Thermostat (123)
Questions & Answers (32)

• Manual 4 Wire Premium Baseboard/Line Volt Thermostat
• Compatible with 120, 240 and 277 vac baseboard heat systems
• Simple dial-type mechanical control

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Store Details & Services Accessories (1) Product Overview
The easy-to-install Honeywell Manual Electric Baseboard Thermostat works on 4-wire (double pole) electric heat applications (baseboard or line volt) and allows for simple, worry-free operation. It has a simple dial-type mechanical control and is UL and CSA listed for safety.

• Mechanical operation, non-programmable thermostat
• 120 - 240-Volt; 4 wire
• Positive off
• Easy to install
• How to install and replace your thermostat
• How to choose the right thermostat for your home
• Click here for more information on Electronic Recycling Programs

Info & Guides

• Use and Care Manual

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Price $21.99/each $24.97/each $44.28/each null¢ /null Name Double Pole 4-Wire Line Voltage Mechanical Thermostat Digital Non-Programmable Thermostat Single-Pole 10.4 Amp 120/240-Volt Digital Electronic Non-Programmable Wall Thermostat in White Manual Electric Baseboard Thermostat Brand Lux Honeywell Cadet Honeywell Ratings View Product View Product View Product View Product Specifications
Dimensions
Product Depth (in.)
1.5
Product Height (in.)
4.5
Product Width (in.)
2.75

Details
Color Family
Whites
Color Family
White
Operation Type
Mechanical
Returnable
90-Day
Shape
Rectangle
Thermostat Product Type
Non-Programmable Thermostat
Thermostat Shape
Rectangular
Thermostat Type
Heat Only
Voltage (v)
110/240v
Voltage (volts)
110/240
Warranty / Certifications
Certifications and Listings
1-UL Listed,CSA Listed
Manufacturer Warranty
1 year limited warranty
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If I have your information right you have a black wire and a white wire marked red coming to the heater with 240 volts between them. You have a double pole unit mounted thermostat with a red and a black wire. Most double pole thermostats have two red and two black wires on them so I am not sure if you have a double or a single pole thermostat.There are also two wires going to the baseboard heater. One is connected to the element the other to a high limit switch which is then connected to the other end of the element. If the thermostat is a double pole the two red (or load) wires should connect one to each of the baseboard wires. The two black (line) wires should connect one each to the two incoming power leads. If it is a single pole thermostat the one red wire should connect to one of the baseboard wires the black should connect to one of the incoming power wires the remaining baseboard and power wires should then be connected together. Hope this helps

If all is connected to the same thermostat and only 2 is not working then you have to ohm out the windings on those heaters ,maybe they are bad

Yes it is acceptable and common practice. You do not need a neutral on a 220 Volt circuit. Just wrap it with black electrical tape so anyone who gets into the wiring later will know that both are hot. This is accepted by the National Electrical Code.

Hot wire from power source to Black wire to thermostat, Red wire from
thermostat to Black wire to heater. Other Black wire from heater to nuetral.

The common usually goes staight to the unit, and the other wire, goes through the thermostat, and the ground wire hooks directly to the chasis of the heater.
If it is a 120 Volt, the white wire should be the common, and the black runs through the thermostat.
If it is a 220 Volt, it doesn't matter which wire goes through the thermostat.

you will have to determine which set closes on a fall in temperature, (use ohm meter and dial the stat to lower temp) you want it to close to complete the circuit as the temperature falls

From the two red and two black wires (and the specs in the pdf), your new thermostat sounds like it's designed to directly control the line voltage (120 or 240) to the heater. That's the usual way baseboard heaters are controlled.

Could your wires be red, black, and (old, yellowed) white, the standard colors in a 3-wire power cable? Just the red and black should be enough to control a 120-volt heater so I don't understand what the white would have been used for. If it were my heater I'd take off the cover(s) -- with the power off, of course -- and find out what those wires actually connect to.

Check the circuit it is plugged into first with a tester or something else.
If it is 240v there are two hot wires.
You have to examine it first for power and then I would check the thermostat next.
You could have an open element.

OK, here's my guess at this...I hope someone more knowledgable will confirm or correct me.

A line voltage thermostat switches the power to the baseboard heater. In other words, it's just like a wall light switch except it activates and deactivates based on the temperature.

I think your old model CT62 was wired exactly like a light switch. The hot wire to the light is broken then run to the wall switch and then back to the light so there's no neutral wire at a light switch box. This worked fine for your CT62 because it did not need power, it only needed to switch it.

The new model TL7235A1003 requires electrical power because it's programmable so you need both a hot wire and neutral wire at it's installed location. In addition you also need 2 wires leading to the baseboard heater so the thermostat can supply it's power.

I believe L1-L2 are to be connected to the hot/neutral wires, and the Load wires go to the baseboard heater.

If I am correct you will not be able to use this thermostat without some re-wiring.

Good luck.