Honeywell C7089U1006 Temperature Sensor for Outdoor Use

brian: Exact replacement for the old one that quit working. Sofar so good

United States on Apr 12, 2023

pab23: Sonde très précise

Canada on Apr 07, 2023

Bob: Not very accurate 8* off at 32* it reads 40* . this really mess's with my ability to have a gas furnace and or boiler act as a auxiliary heat source.

United States on Jan 23, 2023

SAF729: Added this Honeywell temp sensor to my Honeywell T10 thermostat to give much more accuracy than online Accuweather temperature accessed by the T10 thermostat. Provides accurate outdoor temperature to control Aux lockout and Compressor lockout on my heat pump system. Pros: Accurate and works with the Honeywell T10. Also the price and delivery with 50 ft of thermostat cable was good. Cons: No fun fishing this from outside to the thermostat on the interior wall. Also Honeywell does not list the T10 thermometer on the list of compatible thermostats for this C7089U1006 sensor. They need to fix their documentation.

United States on Nov 29, 2022

Peter R.: Easy to install and fixed the problem that I had with the original sensor.

Canada on Jul 10, 2021

Pouit: Exactly as described

Canada on Oct 27, 2019

Amazon Customer: Works great, wired up to my thermostat, reprogrammed the thermostat and is working well

Canada on Jul 03, 2019

Alan S.: Works perfectly with my Honeywell Thermostat, factory part. good price.

Canada on Jan 21, 2017

T.G.: I bought this so I wouldn't have to look up the temperature every morning when my wife asked "how cold is it outside" as she walked by the thermostat.

I placed this sensor under our deck on the windward side of the house so there is plenty of shade and air circulation and little chance of a inaccurate reading. As far as the calibration goes it reads about 2 degrees higher than the Wunderground forecast, but that is what out old outdoor thermometer read before it fail. Here you can get a quarter mile and have a decent shift in weather patterns.

My only real complaint about this product is the length of the cord. By the time I included a drip loop and fed in through the deck ledger board and the house sill plate there was not much cable left. I simply sliced it with some 2-wire thermostat cable I had laying around and fed it the rest of the way to the thermostat. This cord length they provide might work if your thermostat was on an exterior wall and there was an ideal location for the sensor nearby, otherwise plan on having to use extra wire.

I did not find the instructions for this item to be the the most complete or well written, but with a little common sense...

United States on Jan 17, 2015

Patriarchal Unit: Be careful when ordering this Item. I was shopping for a programmable thermostat when I ran across this item. I thought it would be great to see the outside temperature displayed when checking my thermostat. I purchased a Honeywell RTH8500D thermostat to use with this sensor. The thermostat was on sale and the Amazon web page for the sensor indicated it would work with the thermostat. I copied and pasted part of the technical details from the web page for the sensor below:

"Technical Details: Outdoor temperature for display on the T8600 or T8500 family thermostats."

Or link to the page:  Honeywell C7089U1006 Outdoor Temperature Sensor [Misc. ]

After receiving, programming and starting the installation process, I discovered the sensor would not work with the thermostat. The thermostat sub-base lacks the terminals required to connect the sensor wires. I downloaded additional installation instructions and discovered a TH8320U1008 VISION PRO 8000 thermostat is required for the sensor feature. I returned to the sensor web page and noticed the reference to the VISION PRO thermostat was listed. Trouble is it also advises it works with the T8500 family...

United States on Sep 26, 2011