
1) Window heat control unit
Found on
https://www.crosswordclues.com/clue/whcu

WHCU (870 kHz) is a radio station in Ithaca, New York, USA, that programs a news/talk format. The station has been owned by Saga Communications since 2005. ==History== The forerunner to WHCU began in 1912 as an experiment in the School of Electrical Engineering at Cornell University. The original call letters were 8YC, later changed to 8XU. A fore...
Found on
http://en.wikipedia.org/wiki/WHCU

(Aviation abbreviations:) window heat control unit
Found on
http://www.aviationonline.co.uk/glossary/uz.htm
No exact match found.