Hi all.

Sorry if daft question.  

I am using a Av 1300 poweline adapter pushing out to my garden office. The power cable runs from an upstairs bedroom and is in the open for approximately 5m before dropping down underground.  All was working fine until the cold weather arrived bringing freezing temperature. The adapters work fine when brought inside the house to operate but as soon as I take it out again, it fails to connect. There have been no changes inside. 

Question 1, is me router adaptor failing or 2, has does the cold affect the external wiring? Everything in the shed works fine.

Ty in advance and happy new year.