C-Wire Connector for 24V Smart Thermostats

C-Wire Power Support for Compatible Smart Thermostat Installations The SITERWELL Smart Thermostat C-Wire Connector is an installation accessory designed for compatible 24V HVAC thermostat systems that require a reliable common-wire (C-wire) connection for smart thermostat operation. For customers installing the Siterwell GS366A-MWAC Smart Thermostat, this connector provides a dedicated SITERWELL accessory option to help complete a compatible thermostat setup. Always confirm your HVAC wiring and terminal configuration before installation. Why Choose the SITERWELL C-Wire Connector? Built for smart thermostat installations: Designed for compatible 24V HVAC thermostat applications where a C-wire connection is required. GS366A-MWAC ecosystem support: A practical accessory option for compatible SITERWELL smart thermostat installations. Simple system planning: Helps keep thermostat power and installation requirements within one SITERWELL product ecosystem. Installation-focused design: Intended for use as part of a properly verified thermostat wiring setup. Check Compatibility Before Installation HVAC wiring varies by system. Before purchasing or installing this accessory, confirm your thermostat terminals, HVAC control-board wiring and system compatibility. If you are unsure about wiring requirements, consult a qualified HVAC professional. Not compatible with: millivolt systems, high-voltage systems, dual-transformer systems, fan-coil units, and communicating systems. This kit works with standard 24VAC heating and cooling systems only. For product-specific setup and compatibility questions, visit the GS366A-MWAC Smart Thermostat FAQ. For broader SITERWELL product, order and support questions, see the SITERWELL FAQ. Building a GS366A-MWAC setup? Review the GS366A-MWAC Smart Thermostat product page before completing your installation plan.Protect Your DeliveryFor extra protection against eligible physical loss, external damage or shortage while your order is in transit—and eligible theft after delivery within the coverage term—consider adding optional Shipsurance shipping insurance when it is offered at checkout. If you purchased this coverage and a shipping-related issue occurs, review the coverage rules and contact SureCircle first to file a claim or check claim status. Product setup, technical support, product defects and manufacturer-warranty questions remain with SITERWELL. Customer Service U.S. Customer Service Hotline: +1 800-710-7321 Monday–Friday, 9:00 AM–6:00 PM (EST)