Honeywell Home THM5421R02 and THX9421R5021WW Thermostat and 2-wire Adapter

hvacman0408
(85)
PrivateRegistered as a private seller
Consumer protection regulations resulting from EU consumer law are therefore not applicable. eBay buyer protection still applies to most purchases.
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US $110.00
ApproximatelyEUR 95.54
or Best Offer
Condition:
Used
“Excellent working condition! Mint.”
People are checking this out. 5 have added this to their Watchlist.
Postage:
Located in: Lincoln University, Pennsylvania, United States
Delivery:
Varies
Returns:
No returns accepted.
Payments:
    Diners Club

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eBay item number:135892912474
Last updated on 21 Nov, 2025 13:38:37 GMTView all revisionsView all revisions

Item specifics

Condition
Used
An item that has been previously used. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or an item that has been returned to the seller after a period of use. See the seller’s listing for full details and description of any imperfections. See all condition definitionsopens in a new window or tab
Seller notes
“Excellent working condition! Mint.”
Power Source
Battery
Color
White
Items Included
Thermostat, Interface Module
Wire Configuration
2-Wire
Material
Plastic
MPN
YTHX9421R5127WW
Battery Size
3V Button Cell
Compatible Product
Universal
Mounting
Wall-Mounted
Brand
Honeywell
Thermostat Shape
Rectangular
Voltage Type
Low Voltage
Sensor Technology
Temperature
Number of Periods per Programmable Day
7
Control Style
Remote Control, App Control, Digital, Touch
Voltage
24 V
Model
Honeywell THX9421R
Features
Digital Display
Cool Stages
2
Programmability
Programmable
Category

Item description from the seller

About this seller

hvacman0408

100% positive Feedback•390 items sold

Joined Feb 2015
Registered as a private sellerThereby, consumer rights stemming from EU consumer protection law do not apply. eBay buyer protection still applies to most purchases.
Seller's other itemsContact

Seller Feedback (73)

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  • t***t (136)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Exactly as advertised. Fast shipping. Great seller!
    HONEYWELL HOME C7089R3013 RESIDEO OUTDOOR TEMPERATURE AND HUMIDITY SENSOR (#136294989971)
  • 7***3 (32)- Feedback left by buyer.
    Past year
    Verified purchase
    Great experience with this seller. He showed me a picture that answered my question perfectly, and when I ordered he shipped it right away.
    Honeywell Home C7089r3013 Outdoor Sensor, Replacement Sensor, Gray (#135501798028)
  • j***i (256)- Feedback left by buyer.
    Past year
    Verified purchase
    Arrived on time just as they looked in the picture. Will use this vendor again
    Nu-Calgon 4300-09 Rx11 Flush AC/Refrigeration System Flush OEM Endorsed 15.7 oz (#135233791219)
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