I have 2 wires coming from the wall, 1 white and 1 blue and want to wire a new honeywell 5-1-1 day programmable thermostat.

Similar Options to ConsiderSee All

Cadet Double-Pole 22 Amp 120/240-Volt Wall-Mount Mechanical Non-programmable Thermostat in Almond
(26)
$3217/each
Cadet Double-Pole Electric Baseboard-Mount Mechanical Thermostat in White
(84)
$2498/each
Economy Heat/Cool Manual Thermostat
(128)
$1888/each
Wireless PTAC Wall Remote Thermostat
(0)
$18482/package
tekmar Radiant 519 - Digital Non-Programmable 1-Stage Heat Thermostat with Slab Sensor 079
(3)
$11563/each
White RodgersB30 Baseboard Non-Programmable Thermostat - Single Pole
(1)
$1256/each
Broan Cold Weather Non-Programmable Solar Power Attic Vent Thermostat
(0)
$986/each
Was $24.66
Fahrenheat Non-Programmable Wall-Mount Thermostat
(18)
$2074/each
White RodgersB50 Baseboard Non-Programmable Thermostat - Dual Pole
(6)
$1999/each
Cadet Single-Pole Electric Baseboard-Mount Mechanical Thermostat in White
(42)
$2198/each
Cadet Double Pole 15 Amp 208/240-Volt Digital Electronic Non-Programmable Wall Thermostat in White
(72)
$5808/each
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

Quantity -
+ store iconPick Up In Store
Unavailable at Guam - Tamuning
Check Nearby Stores package iconWe'll Deliver It to You
UnavailableDelivery is unavailable for this product Your local store: Guam - Tamuning
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

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.
Compare Similar Non-Programmable Thermostats
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
How can we improve our product information? Provide feedback.

Time to replace unit.

More than likely, this is what you have:

Red- Power- (RC/RH)
White- Heat- (W)
Green- Fan- (G)
Blue- Cool- (Y)

Usually, the only times you need more than 4 wires are:

1. You have a HeatPump system.
2. Your new digital thermostat does not use batteries, which then you have to have a common wire to power the thermostat.

What were the wires hooked up to before??

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

I just installed a Honeywell 5.2 Day RTH2310B Programmable thermostat and I had to deal with the same situation: 2 wires, one white one black. After reading the edvice in one of the blog, the solution that worked for me was: BLACK ON Rc terminal and WHITE on W terminal. My furnace is running fine now. Hope it helps.

If you have a 5 wire thermostat then you have a two transformer system a cooling transformer and a heating transformer.
The cooling transformer wires to Rc - Y - G,
and the heating transformer wires to R - W the R terminal heating would be the #4 terminal from the old stat.

rh is power for cooling terminal and rh is power for heating terminal connect red wire to rc or rh and there should be a jumper between rc and rh if not install one all other wires are color coded correctly. now the blue wire is not used.

I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire

Thanks for your help

You have a heat pump. You need a thermostat for "Heat pump with Electric back-up heat". Make sure the 'stat has either an "aux" (auxilliary heat) or an "E"(Emergency heat) terminal. The wiring instructions will be provided with the thermostat.

Normally, you should have 5 color wires: W-White, Y-Yellow, G-Green, R-Red and C-Blue.

The Blue wire is a common from the transformer on older systems, which is probably hooked to RC terminal.

Try this: Remove the blue wire and jump the RC to RH with the red wire and you will be fine. Blue wire should not be needed with the new thermostat.

This should also be stated in the instruction manual.
Hope this helps.