Reconditioned 

Thermia / Danfoss Outdoor Temperature Sensor, model 086U2701,334925 commonly used in many Thermia and Danfoss heat‑pump systems.

• Reconditioned for like-new performance at a more affordable cost

What This Sensor Is
•     An outdoor temperature sensor used by Thermia and Danfoss heat pumps to regulate heating curves.
•     Often required when you get outdoor‑temperature error codes (e.g., error 320 on some iTec units).
•     Supplied with an outer casing depending on the retailer.
Sources:

Part Numbers Explained

All three refer to the same outdoor sensor.

Compatibility 
This sensor fits a wide range of Thermia and Danfoss heat pumps, including:
•     Atec Plus / Atec Total
•     Atria / Atria Optimum
•     Diplomat (including Optimum G2/G3)
•     Eko
•     Legend
•     Robust
•     Solid / Solid Eco
•     Villa
•     Duo 8 / Duo 10
•     Danfoss Villa Classic 155
•     iTec Eco / iTec Diplomat