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-   -   ACONT800 Thermostat and Outdoor Temp Sensor (http://www.diychatroom.com/f17/acont800-thermostat-outdoor-temp-sensor-87789/)

tbzep 11-26-2010 02:08 PM

ACONT800 Thermostat and Outdoor Temp Sensor
 
My outdoor temperature sensor reads about 5 degrees too high. I've extended the leads about 6' to move the thermistor into permanent shade on the north side of the unit. It's about 5 ft. from the foundation in an area that never receives direct sunlight.

Is there a way to calibrate the thermostat to compensate for the incorrect reading? I can always subtract 5 in my head, but it would be nice to show the correct temp on the screen. Additionally, it's a dual fuel unit, so it doesn't switch over at the correct temperature.

kb3ca 11-26-2010 02:40 PM

If you go to hvac-talk you will see a number of posts regarding these OD sensors. The first one I had was off 4-8 degrees high during the hot weather and 4-8 degrees low during cooler weather. I just compensated for the error with the thermostat dual fuel lockout setting. The replacement one is pretty accurate when the sun isn't shinning near it. I am using the Honeywell Pro IAQ.
Read those other posts for some further insight on this issue.

tbzep 11-28-2010 06:31 PM

Quote:

Originally Posted by kb3ca (Post 540821)
If you go to hvac-talk you will see a number of posts regarding these OD sensors. The first one I had was off 4-8 degrees high during the hot weather and 4-8 degrees low during cooler weather. I just compensated for the error with the thermostat dual fuel lockout setting. The replacement one is pretty accurate when the sun isn't shinning near it. I am using the Honeywell Pro IAQ.
Read those other posts for some further insight on this issue.

Thanks


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