Question about 1995 Volkswagen Passat
Here are the cooling system diagnostic
steps...First does the cooling fan kick on (with engine hot)? If not,
check the fuse, if good then check the thermoswitch in the
radiator (it's about an inch and a half in diameter located on the
lower part of the radiator with two wires ) by disconnecting the
wires and touching them together (again, with engine hot...at least
190 degrees) if the fan comes on, you have a bad switch. If not
connect a 10 gauge jumper wire from the battery to the fan itself
(there are three terminals,,, one high, one low and ground). With
power direct from the battery (and a ground wire, if necessary) fan
should run... if not replace the fan assembly... if it does run then
you have a bad cooling fan relay (under the dash, I believe). Hope this helps... ;-)
Posted on Apr 21, 2009
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Posted on Jan 02, 2017
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Nov 17, 2016 | Cars & Trucks
Nov 24, 2015 | Cars & Trucks
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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