snowflake in dash cluster?

i would search but dont understand how to . can someone tell me what the snowflake on the bottom row of the dash cluster with the signal indicators and the hi beam light? just noticed it stays on when key is turned off. 2000 w900l.

 

thank you for the responce. well this one indicates that my boys turned the fridge on with out telling me. my wife asked me this morning why the outside temp guage flashed "ice" as it was raining dropping down johnson pass. it was reading 36 deg. sorry for the silly question. we still have some snow in the trees beside the road so your responce was valid. the snowflake goes out when you turn the switch on the sleeper control panel off.