By-Pass Thermostat, Checking
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 Volkswagen Jetta, 2009 Volkswagen Jetta, 2008 Volkswagen Jetta, 2007 Volkswagen Jetta, and 2006 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
-- Remove the operating element -3- and heat it in a hot water bath.
Starts to open: approximately 75 °C (167 °F)
Opening end: approximately 85 °C (185 °F)
Opens: approximately 5 mm