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Where is the thermoswitch on audi a4 1998 1.8

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  • Audi Master
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COOLANT TEMP SENSOR ON COOLANT PIPE.

Posted on May 31, 2010

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Posted on Jan 02, 2017

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My mazda protege is having a heating problem. The temp guage will go up to the normal place as the engine warms up but then when I drive down the road the temp guage goes down to below cold and then my car...


I believe the mazda protege has a separate thermoswitch to activate the radiator's fan. Perhaps the fan keeps blowing until the temperature is too low. Try replacing the fan thermoswitch. Just take care to put in tis place a thermoswitch of the same temperature range.

Nov 11, 2013 | Cars & Trucks

1 Answer

Fans on a Audi A6 don't come on, is it the thermoswitch, if so where is it?


You can put those on an independent switch. The sensor for the gauge is mounted on the bottom of the coolant inlet neck on the left side of the engine, it is actually called an Electronic Thermoswitch. The fan relay has most likely gone bad.Here's the fan relay location, remove the kick panel above driver side feet. It's the one behind the big #287. Double check on the coolant sensor located behind the engine on the drivers side.

Oct 16, 2012 | 1995 Audi A6

1 Answer

How to find Audi a3 1.8t sport relay switch for coolant fan.


Haven't heard of a relay switch for coolant fan. You must be talking about thermoswitch which starts your coolant fan when coolant reaches a certain temperature. Normally it is fitted on the radiator itself

Apr 09, 2012 | 2004 Audi A3 Sportback

1 Answer

ENGINE TEMP GOES TO HOT. I APPLIED POWER DIRECTLY TO FAN FAN OPERATES.BUT WHEN THE ENGINE GETS ABOVE OPERATING TEMP THE FAN DOES NOT RUN.


Hello,

Thanks for using FixYa.

Your problem is a simple, you have a busted thermoswitch. The thermoswitch is a sensor that engages the fan to get the engine to stay on normal operating temperatures. If the its too cold, the fan should get shut off if its to hot the fan should keep running. If the thermoswitch dies, the fan could either keep running or not run at all. Have the thermoswitch replaced. It's just a 15 minute job for a seasoned mechanic.

I hope this helps. Thanks and good day.
- HotRatchet

Jun 14, 2010 | Lincoln Town Car Cars & Trucks

1 Answer

The radiator fan doesn't seem to be working. I


Fan fuse is located in the underbonnet fuse box Check that power is going to fan with a test probe because it could also be the thermoswitch

Jul 10, 2009 | 1999 Audi A6

1 Answer

1994 Saab 900 S convertible running hot


You don't say whether your electric fans both work...

First, check fuses #25 and #6 (both 30 amp)

There is a fan thermoswitch is on the left side of the rad. Turn the ignition on, and after pulling back the boot, short across the two terminals with a screwdriver.

If the fan runs, fan and wiring are both good, but thermoswitch might be faulty.

If fan only runs when thermoswitch is shorted like this, switch needs to be replaced (I strongly recommend that you get the low temp switch to prevent overheating - your temp gauge will not go over the middle position even on the hottest days; also get a low temp thermostat,and ALWAYS get a Saab stat, not an after market one! The SAAB stats are three position, and most after market ones aren't)

if the fan doesn't run when switch is shorted, check for voltage between green wire and ground at the switch.

Voltage indicates faulty fan, if no voltage then check the fan relay J in the main fuse box for the A/C rad fan, and also check relay G - it's for the rad fan.

Hope this helps!

Saabreur

Jun 22, 2009 | 1994 Saab 9 3

2 Answers

Electric fans runs after car is shut off, drains battery


Having the fan run on for a bit after the engine has stopped is not abnormal in itself, but 20 minutes sounds excessive.

If the fan does eventually shut off, I'd consider changing the thermoswitch (this is a sensor screwed into the radiator somewhere near the bottom, with a pair of wires connected to it - to change it, you'll need to drain the cooling system).

If the fan stays on continuously until the battery is completely flat, see what happens when you unplug the wires from the thermoswitch. If this stops the fan, you need to replace the thermoswitch. If it doesn't, then you need to examine the wiring associated with the switch and the fan, looking for damaged insulation.

A.

Nov 28, 2008 | 1999 Volkswagen Passat

1 Answer

1994 9000C Runs hot


Could be the fan thermoswitch. The thermoswitch, if there is one*, is located on the lower portion of the radiator just in front of the turbo outlet pipe. Here is a picture.
You may also have one of the fan relays failing. (On some cars, there were two relays, one for low speed and one for high). Here is a picture.
For general diagnostics of the cooling system, go here.
2 stage cooling fan wiring diagram here.
This also will tell you where to find other components to check, like the fan speed resistor, and provide other diagnostic checks.

Oct 16, 2008 | 1994 Saab 9000

1 Answer

1989 Ford Festiva, keeps stalling as driving.


I had the exact same problem. The cooling fan was failing to come on and thus overheating the engine. Check the cooling fan, cooling fan thermoswitch, and cooling fan relay ( behind drivers headlight ). If you pull the connector off of the thermoswitch the fan will come on whenever the car is in "run"

Aug 18, 2008 | 1989 Ford Festiva

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