Does this product need to be plugged into an AC outlet ?

No, it has to be wired into the furnace!

Will this work with a 3 wire heat only forced air system?? My system only has red,white & green wires...Or can I just use the green wire as a common.

Hi Rcq78, this C wire adapter requires 4 wires. If you have only 3 wires we recommend contacting your HVAC contractor to help you run a new wire from the C on your heating system to C on the thermostat. - Maria

Will this product work with a 2 wire system?

Hi Marcella, thanks for contacting us. Since your system has 2 wires only, we recommend checking on the furnace motherboard to see if there is a C terminal and run a new wire from that C to the thermostat on C. The other option will be to Install a second transformer that provides 24Volts. The adapter won't be compatible. Please, feel free to reach us at 1-855-733-5465. We'd be glad to assist you with further information. Thank you.

Can this me used in a dual application with 2 of the same thermostat’s. First floor and second floor?

No, a Honeywell Home CWIREADPTR C-Wire Power Adapter will be required for each thermostat. -Jerry

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

C-Wire Adapter

Product ID: 165172708

Details

Brand
Honeywell
Color
White
Compatible Devices
Thermostats
Connector Type
Barrel
Included Components
C-wire adapter
Input Voltage
24 volts

⚡24V continuous power output

📏Compact, adhesive mount design

🔧Easy push terminal installation

¥22098

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

⚡ Power your smart home effortlessly—no C-wire? No problem!

FUTURE PROOF YOUR HVAC - Supports multi-stage systems and heat pumps, so your smart thermostat stays ahead of your home's needs.
EFFORTLESS INSTALLATION - Push terminals and adhesive mount make setup quick and tool-free—get connected in minutes, no electrician needed.
SLEEK DISCREET DESIGN - Modern white enclosure with a closed cover keeps your installation site clean and professional-looking.
UNIVERSAL COMPATIBILITY - Works with most forced air, hot water, steam, and heat pump systems—except electric baseboard heat.
POWER UP YOUR SMART THERMOSTAT - Delivers steady 24V power to Wi-Fi thermostats missing a C-wire, ensuring seamless smart home integration.

The Honeywell Home CWIREADPTR C-Wire Power Adapter provides a reliable 24V power source for Wi-Fi thermostats lacking a common wire. Featuring easy push terminals and an adhesive mount, it enables quick, clean installation compatible with most HVAC systems except electric baseboard heat. Its sleek design conceals wiring for a professional finish, making it the perfect upgrade for modern smart homes.

Specifications

ASIN	B07VMV2BJ7
Best Sellers Rank	#727,020 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #582 in Home Thermostat Accessories
Brand	Honeywell
Built-In Media	C-wire adapter
Color	White
Compatible Devices	Thermostats
Connectivity Technology	Wi Fi
Connector Type	Barrel Connector
Current	DC
Customer Package Type	Standard Packaging
Customer Reviews	4.2 4.2 out of 5 stars (1,316)
Enclosure Material	Plastic
Form Factor	compact and flat design with a barrel connector and wires
Global Trade Identification Number	00085267419789
Input Voltage	24 volts
Item Type Name	C-Wire Power Adapter
Item Weight	5.92 ounces
Main Power Connector Type	2 Pin
Manufacturer	Honeywell Home
Mfr Part Number	CWIREADPTR4001
Model Name	Honeywell Home C-Wire Power Adapter
Model Number	CWIREADPTR4001
Mounting Type	adhesive mount
Number of Items	1
Output Current	15 A
Output Voltage	24 volts
Power Plug	No Plug
Power Source	Corded Electric
UPC	085267419789
Unit Count	1 count
Warranty Description	1 Year Limited
Wattage	24 watts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥22098

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

View all Trustpilot reviews