Question about 2003 Volkswagen Passat
I doubt it.
The sensor is for the computer and the temp gauge on the dash.
If the heater hoses are getting hot, and the radiator is full of coolant, you may have a blend door problem.
The blend doors direct air thru the heater core and the vents.
Posted on Jan 08, 2013
Change cap on top of water overflow bottle, usually blue, and empty coolant and top up with 4 litres vw antifreeze and fill up rest with filtered rainwater .
Posted on May 15, 2014
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Posted on Jan 02, 2017
Has the car been changed coolant since it was bought? If it is time to change, let do a flush through a heater core. There are 2 coolant hoses going thru a fire wall. One for coolant in and one for coolant out. Heater only works if coolant is flowing through the heater core. Therefore, there are one or both following cases contributes to the problem: 1-If the valve control coolant flow gets stuck, then it always closes so there is no heat. 2-If the valve is working, but the heater core gets clogged up, then there is no heat.
Posted on Oct 11, 2009
SOURCE: coolant temperature sensor?????
um...strange ...engine temp reaches 210 before thermostat opens and lets water circulate ..fans go on before that normally..180 or so..hot air from heater going to cold air? strange...could you elaborate for me /us?
Posted on Nov 10, 2008
first check the coolant level and for contamination always check cool or cold fill the resivoir and if it has a rad cap check it too if all looks good then maybe t- stat
Posted on Feb 25, 2010
SOURCE: volkswagen jetta over heating
it could be an air lock stopping the water from circulating properly i seem to recall this problem on the older VW Derby and audi 50 (same engine) there is a small bleed screw at the highest point on the cooling system that allows you to bleed this air out youll find its location in the manual
another thing to try is put a flushing agent through the system incase there are any blockages in the radiator itself
hope this helps
Posted on Oct 28, 2008
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