740GLE
Top Post Dawg
- Joined
- Aug 19, 2009
- Location
- NH
- TDI
- 2017 Alltrack SE; Totaled 2015 Passat SEL, BB 2010 Sedan Man; 2012 Passat SE w/ Nav,
(WILD GUESS)It's probably a sensor to detect water in the bottom of the IC hose, and it'll prevent a start up w/ water ingestion. The real big fix is in how the IC itself is built and internally plumbed that'll prevent ice to form in the first place. It'd be interesting to compare the two ICs.