1. Introduction
The PDEEY C Wire Adapter provides a stable 24V power supply for smart thermostats and video doorbells that require a C-wire connection but lack one in existing wiring. This adapter eliminates the need for complex rewiring, offering a straightforward solution for powering compatible devices such as Nest, Ecobee, Honeywell, Ring, and Wyze products.
2. Important Safety Information
- Always disconnect power to your thermostat or doorbell system at the circuit breaker before beginning any installation.
- Ensure all connections are secure to prevent electrical shorts or malfunctions.
- Do not attempt to modify the adapter or its wiring.
- If you are unsure about any step, consult a qualified electrician.
- Keep the adapter and wiring away from water and excessive heat.
3. Package Contents
- 1 x PDEEY C-WIRE ADAPTER with 26 FT cable
- Nail clips for cable management

Image 3.1: Contents of the PDEEY C Wire Adapter package, including the adapter, coiled cable, and a bag of nail clips.
4. Installation Guide
4.1. Compatibility
This C wire adapter is compatible with various smart home devices, including:
- Nest Thermostats
- Ecobee Thermostats
- Honeywell Thermostats
- Lowe's Iris Thermostats
- Tado Thermostats
- Sensi Thermostats
- Ring Video Doorbells
- Wyze Video Doorbells
4.2. Wiring Overview
The adapter features two wires at the end of its 26-foot cable:
- Black Wire: This is the negative wire, typically connected to the C (Common) terminal.
- White Wire: This is the positive wire, typically connected to the R, RC, or RH (Power) terminal.

Image 4.1: Diagram illustrating the function of the black and white wires for connection to C and R/RC/RH terminals.
4.3. Installation Steps
- Disconnect Power: Before starting, turn off the power to your HVAC system or doorbell at the circuit breaker to prevent electrical shock.
- Identify Terminals: Locate the C and R (or RC/RH) terminals on your smart thermostat or video doorbell. Refer to your device's manual for specific terminal locations.
- Connect Wires to Thermostat:
- Insert the black wire from the PDEEY adapter into the C terminal.
- Insert the white wire from the PDEEY adapter into the R, RC, or RH terminal.

Image 4.2: Visual guide for connecting the adapter wires to a thermostat's C and RC terminals.
- Connect Wires to Video Doorbell:
- For video doorbells, connect the black wire to one of the doorbell's power terminals and the white wire to the other. The doorbell typically does not distinguish between C and R, but requires a 24V AC power source.
- Ensure the doorbell's internal battery (if any) is not removed, as the adapter provides continuous power.

Image 4.3: Visual guide for connecting the adapter wires directly to a video doorbell's power input.
- Secure Connections: Tighten the terminal screws to ensure a firm connection.
- Route Cable: Use the provided nail clips to neatly route the 26-foot cable from the adapter to your device. The generous cable length allows for flexible placement of the adapter.
- Restore Power: Once all connections are secure and the cable is routed, restore power at the circuit breaker.
- Test Device: Verify that your smart thermostat or video doorbell powers on and functions correctly.

Image 4.4: An illustration demonstrating the 26-foot length of the adapter cable.
5. Operation
Once properly installed, the PDEEY C Wire Adapter operates continuously, providing the necessary 24V power to your connected smart thermostat or video doorbell. There are no user-adjustable settings or operational controls on the adapter itself. Its function is to convert standard AC power to the required low-voltage AC for your smart device.
6. Maintenance
The PDEEY C Wire Adapter requires minimal maintenance. Periodically check the wiring connections to ensure they remain secure and free from corrosion. Keep the adapter unit clean and free from dust. Avoid placing the adapter in areas with extreme temperatures or high humidity.
7. Troubleshooting
- Device Not Powering On:
- Ensure power is restored at the circuit breaker.
- Verify that the adapter is securely plugged into a working electrical outlet.
- Check all wire connections at the thermostat/doorbell terminals and ensure they are tight and correctly matched (Black to C, White to R/RC/RH).
- Confirm compatibility of your device with a 24V AC power source.
- Intermittent Power/Connection:
- Inspect the wiring for any damage or frayed sections.
- Ensure the terminal connections are not loose.
- Adapter Feels Warm:
- It is normal for power adapters to feel slightly warm during operation. If it becomes excessively hot or emits a burning smell, immediately disconnect power and contact support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | PDEEY-ModelNumber |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 24V AC, 500mA |
| Cable Length | 26 feet (approximately 7.9 meters) |
| Power Source | Corded Electric |
| Mounting Type | Wall Mount (for adapter unit) |
| Certifications | CE |
| Package Dimensions | 6.73 x 3.27 x 1.77 inches |
| Item Weight | 8.47 ounces |
9. Warranty and Support
PDEEY is committed to providing high-quality products and customer satisfaction. If you encounter any issues with your C Wire Adapter, please contact our customer support team for assistance. We aim to provide prompt and satisfactory solutions to any concerns you may have.
For support, please refer to the contact information provided with your purchase or visit the official PDEEY store on Amazon.