York S1-ADDWIRE Kit
The York S1-ADDWIRE Add-A-Wire Kit is an essential field-proven solution for retrofitting modern thermostats in applications where pulling new thermostat cable is impractical. Designed for HVAC 24V control systems, this kit allows you to effectively add an additional conductor to an existing 4-wire cable, facilitating the connection of a C-wire (common wire) required for Wi-Fi enabled and smart thermostats. By utilizing a diode "Y" splitter at the thermostat and a relay-equipped accessory module at the furnace or air handler terminal block, this thermostat wire adapter multiplexes existing signals to expand system functionality without the labor cost of fishing new wires through finished walls.
This York genuine OEM replacement part ensures full compatibility with conventional heating and cooling systems, including single-stage heat pumps and standard split systems. The module is typically mounted inside the equipment cabinet or control box, protected from the elements. With 18-22 gauge wire compatibility, it handles the standard load requirements for 24VAC control circuits. Whether you are adding cooling to a heat-only system or upgrading a legacy mercury thermostat to a modern digital interface, the S1-ADDWIRE kit eliminates common power-stealing issues and communication errors associated with inadequate wiring.
Key Benefits- Eliminates New Wire Pulls: Adds a virtual fifth wire to existing 4-conductor cables, saving significant labor time on retrofits.
- Constant Power for Smart Stats: Provides the necessary 24VAC common connection to power high-draw Wi-Fi and touchscreen thermostats.
- Versatile Application: Capable of making one thermostat work like two or adding a cooling stage to a heat-only HVAC system.
- Compact Control Module: Fits easily within the furnace or air handler wiring compartment with standard 9-inch lead lengths.
- Professional Grade Reliability: Engineered as a durable alternative to battery-only operation or "power-stealing" thermostat configurations.
Can I use this kit if I only have 2 wires at my thermostat?
Yes, this kit can facilitate a 3-wire connection (typically R, W, and C) using only 2 physical wires, allowing for 24V power at the thermostat interface.
Is the S1-ADDWIRE compatible with heat pump systems?
It is compatible with most conventional heat pump applications. When used with a heat pump, a jumper is often required across the Y and O terminals at the thermostat for proper reversing valve operation.
Where do I install the accessory module?
The module should be mounted inside the HVAC unit’s control cabinet, within roughly 9 inches of the terminal block, to ensure the leads reach the R, C, Y, G, and W terminals as needed.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $47.24
-65%$47.24
$16.53York S1-ADDWIRE Kit
The York S1-ADDWIRE Add-A-Wire Kit is an essential field-proven solution for retrofitting modern thermostats in applications where pulling new thermostat cable is impractical. Designed for HVAC 24V control systems, this kit allows you to effectively add an additional conductor to an existing 4-wire cable, facilitating the connection of a C-wire (common wire) required for Wi-Fi enabled and smart thermostats. By utilizing a diode "Y" splitter at the thermostat and a relay-equipped accessory module at the furnace or air handler terminal block, this thermostat wire adapter multiplexes existing signals to expand system functionality without the labor cost of fishing new wires through finished walls.
This York genuine OEM replacement part ensures full compatibility with conventional heating and cooling systems, including single-stage heat pumps and standard split systems. The module is typically mounted inside the equipment cabinet or control box, protected from the elements. With 18-22 gauge wire compatibility, it handles the standard load requirements for 24VAC control circuits. Whether you are adding cooling to a heat-only system or upgrading a legacy mercury thermostat to a modern digital interface, the S1-ADDWIRE kit eliminates common power-stealing issues and communication errors associated with inadequate wiring.
Key Benefits- Eliminates New Wire Pulls: Adds a virtual fifth wire to existing 4-conductor cables, saving significant labor time on retrofits.
- Constant Power for Smart Stats: Provides the necessary 24VAC common connection to power high-draw Wi-Fi and touchscreen thermostats.
- Versatile Application: Capable of making one thermostat work like two or adding a cooling stage to a heat-only HVAC system.
- Compact Control Module: Fits easily within the furnace or air handler wiring compartment with standard 9-inch lead lengths.
- Professional Grade Reliability: Engineered as a durable alternative to battery-only operation or "power-stealing" thermostat configurations.
Can I use this kit if I only have 2 wires at my thermostat?
Yes, this kit can facilitate a 3-wire connection (typically R, W, and C) using only 2 physical wires, allowing for 24V power at the thermostat interface.
Is the S1-ADDWIRE compatible with heat pump systems?
It is compatible with most conventional heat pump applications. When used with a heat pump, a jumper is often required across the Y and O terminals at the thermostat for proper reversing valve operation.
Where do I install the accessory module?
The module should be mounted inside the HVAC unit’s control cabinet, within roughly 9 inches of the terminal block, to ensure the leads reach the R, C, Y, G, and W terminals as needed.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The York S1-ADDWIRE Add-A-Wire Kit is an essential field-proven solution for retrofitting modern thermostats in applications where pulling new thermostat cable is impractical. Designed for HVAC 24V control systems, this kit allows you to effectively add an additional conductor to an existing 4-wire cable, facilitating the connection of a C-wire (common wire) required for Wi-Fi enabled and smart thermostats. By utilizing a diode "Y" splitter at the thermostat and a relay-equipped accessory module at the furnace or air handler terminal block, this thermostat wire adapter multiplexes existing signals to expand system functionality without the labor cost of fishing new wires through finished walls.
This York genuine OEM replacement part ensures full compatibility with conventional heating and cooling systems, including single-stage heat pumps and standard split systems. The module is typically mounted inside the equipment cabinet or control box, protected from the elements. With 18-22 gauge wire compatibility, it handles the standard load requirements for 24VAC control circuits. Whether you are adding cooling to a heat-only system or upgrading a legacy mercury thermostat to a modern digital interface, the S1-ADDWIRE kit eliminates common power-stealing issues and communication errors associated with inadequate wiring.
Key Benefits- Eliminates New Wire Pulls: Adds a virtual fifth wire to existing 4-conductor cables, saving significant labor time on retrofits.
- Constant Power for Smart Stats: Provides the necessary 24VAC common connection to power high-draw Wi-Fi and touchscreen thermostats.
- Versatile Application: Capable of making one thermostat work like two or adding a cooling stage to a heat-only HVAC system.
- Compact Control Module: Fits easily within the furnace or air handler wiring compartment with standard 9-inch lead lengths.
- Professional Grade Reliability: Engineered as a durable alternative to battery-only operation or "power-stealing" thermostat configurations.
Can I use this kit if I only have 2 wires at my thermostat?
Yes, this kit can facilitate a 3-wire connection (typically R, W, and C) using only 2 physical wires, allowing for 24V power at the thermostat interface.
Is the S1-ADDWIRE compatible with heat pump systems?
It is compatible with most conventional heat pump applications. When used with a heat pump, a jumper is often required across the Y and O terminals at the thermostat for proper reversing valve operation.
Where do I install the accessory module?
The module should be mounted inside the HVAC unit’s control cabinet, within roughly 9 inches of the terminal block, to ensure the leads reach the R, C, Y, G, and W terminals as needed.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
