C-Wire Connector for 24V Smart Thermostats
Power Extender Kit for SITERWELL GS366A-MWAC. Designed for compatible 24V HVAC systems without an active C-wire.
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C-Wire Connector for 24V Smart Thermostats
Sale price$23.99 USD
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(Sorry, this service is not available in your region.)
What's in the Box
Power Extender Kit × 1
User Manual × 1
Frequently asked questions
What problem does the GS136A-WCAN solve?
What problem does the GS136A-WCAN solve?
It is a Power Extender Kit for homes without a C-wire at the thermostat. It draws continuous 24V AC from the HVAC control board and supplies the smart thermostat, so you do not need to pull new thermostat cable through walls.
Is the GS136A-WCAN compatible with my thermostat?
Is the GS136A-WCAN compatible with my thermostat?
It is designed for the GS366A-MWAC and compatible 24V AC systems. It is not compatible with millivolt systems, high-voltage systems, dual-transformer systems, fan-coil units or communicating systems. Confirm your wiring before ordering.
How many wires does the GS136A-WCAN need at the wall?
How many wires does the GS136A-WCAN need at the wall?
The existing system needs either four wires (W/W1, Y/Y1, G, R) or three wires (Y/Y1, G, R) between the thermostat and the furnace control board. The kit includes wire labels to identify them.
Where does the GS136A-WCAN install?
Where does the GS136A-WCAN install?
It installs at the HVAC control board, not at the thermostat wall plate. You connect the existing R, Y, G and W wires to the PEK and the PEK’s leads to the control board, following the manual’s step-by-step diagram.
Do I need to run new thermostat wire?
Do I need to run new thermostat wire?
No. The PEK uses the existing thermostat wires. It still requires wiring work at the furnace or air-handler control board, so turn off power at the breaker and follow local electrical code.
Does the GS136A-WCAN work with a dual-transformer system?
Does the GS136A-WCAN work with a dual-transformer system?
No. If the control board has separate Rc and Rh wires connected to two transformers, the PEK cannot be used. Use a qualified HVAC technician for dual-transformer configurations.
Does the box include a thermostat?
Does the box include a thermostat?
No. The GS136A-WCAN is an accessory; the thermostat is sold separately. The box contains one Power Extender Kit with labeled wires and one user manual; tools are not included. Check the box contents before starting.
What warranty applies to the GS136A-WCAN?
What warranty applies to the GS136A-WCAN?
The installation manual is a wiring guide and does not state the full warranty terms. Check the warranty page or your order documentation for the current coverage.