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Rear window demister not working - 2002 Audi A4

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The first thing to check are all of the fuses. If they all look good- post back in the comments and we can give you additional troubleshooting steps.

Posted on Feb 19, 2014

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Posted on Jan 02, 2017

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2 Answers

My rear window defroster doesn't seem to work any more on 2012 xterra any idea where i should look for problem no blown fuse


rear heater fuse if there.. is in the interior group of fuses

the switch may be faulty

or the glass demister contacts have broken

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Nov 10, 2016 | Nissan Xterra Cars & Trucks

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2001 focus rear demister fault


you know those little brown lines on the inside of your rear window, they are wires and can get damaged when cleaning your window. get an OHMS meter and you can actually test the lines on your glass and find the damaged sectors, you can get repair kits to do repairs

Nov 28, 2013 | Cars & Trucks

1 Answer

Demister not working but light is on


A demister, ?
my guess, is the rear window , defog/defroster heater is dead.
right.?
this is easy , is there 12vdc across the heater element.
Yes the the grid is cut. open. damaged
NO? then the relay or switch up front or fuse is bad.
there i cut the problem in 1/2 for you.


Nov 07, 2013 | 2002 Jeep Grand Cherokee

1 Answer

Rear window demister


demister? ah rear defogger (glass heater), (thanks wiki)
it's also and option.

what car, what year. all are diffreent.
pre 96 is here. (my work)
21 is just to right of dash dimmer pot. 46
http://www.fixkick.com/ECU/92-95-dash-parts.JPG

Oct 13, 2013 | Suzuki Cars & Trucks

1 Answer

Battery draining when rear defrost is turned on what casing this


You do not say what brand and model vehicle you have.

The rear window demisters drain a lot of power and are usually programmed to switch off automatically after about 15 or 20 minutes of use. They should also cut out fully when the vehicle's ignition is turned off and of course when you manually switch them off.

1. When you are driving and running a host of electrical units simultaneously in winter there is maximum power drainage and any shortfall in power from the alternator has to be drawn from the battery. This will be a problem if you have a weak battery that is not holding it's charge well or if the battery is not fully charged once it has been nearly or fully drained. It will also be a problem if the alternator is not producing it's optimum power while the vehicle is running.

Batteries do not respond well to being drained frequently and when they are they should always be fully charged again each time with a battery charger at the earliest opportunity. (Running them down and then expecting the vehicle's alternator to do all the battery recharging is not a sound practice).

2. It is possible the rear demister is not shutting down automatically after a period of operation as it is likely to be programmed to do in your vehicle. This is easily checked. If it is not shutting down, and the battery is needed to supplement the vehicles power supply when driving, then the battery can be run down in time.

3. If the rear demister is left active but not shutting down when your ignition is turned off your battery will quickly drain.
You should check that power to the rear demister is off once the ignition is switched off (and when you switch the demister off manually). This is unlikely to be a problem but in the unlikely event that you find it is still operating then you can pull the fuse dedicated to the rear demister.

I hope this helps.

Dec 15, 2010 | Jeep Cherokee Cars & Trucks

1 Answer

BMW 316i E36 1994, Rear window demister isn't working, Fuses are ok, demister switch lights up when pressed. Any suggestions on how to trouble shoot?


Check rear demister control relay operation,
Check for presence of 12V power (and ground connection) at rear window heater connection.

Check continuity of the rear window heating element.

Aug 17, 2009 | BMW 318 Cars & Trucks

2 Answers

Replaced battery on freelander rear window will not stay up carried out procedure in manual but window goes up beeps and goes down.no problem at all untill battery replaced.


disconnect battery reconect after 5 mins on reconnection rear window will go down , use key in rear lock to reset rear window, door lock should now work, if not try rear door relays behind left hand rear panel.

Jun 13, 2009 | 2002 Land Rover Freelander

1 Answer

Aircon/heater/rear window demister not working.


Youes probably begot a bad connection inside the fuse block. You can try cleaning fuse contacts with a really small nail file or something to re-establish contact.

Feb 13, 2009 | 2000 Jeep Grand Cherokee

1 Answer

My demister in rear windscreen not working


Do you have rear window tinting?( the plastic sheet type ) If so,check that the edges over the demister tapes have not curled up pulling the tapes off the window and diconnecting them. If they need repair, a small bottle of tape repair solution should be available from a spare parts retailer.
El Nombre

Nov 06, 2008 | 1999 Daewoo Lanos

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