Question about 2001 Jeep Grand Cherokee

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With the car turned off the heater comes on

Keeps running battery down

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  • Jeep Master
  • 20,706 Answers

Car wiring was hacked, this is impossible on a stock car
unless hacked or the Ignition switch is bad.

hacked means adding things to the wiring on the car
cruise.
new audio stuff
remote starts
alarm boxes, , fog lamps. etc.

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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1 Answer

Turned the heater and car off but fan keeps blowing - now cold air - at full blast. had to disconnect battery to get it to stop


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Turn the key and it will not start


cold weather kills batteries this time of year...heres why..most batteries are a chemical factory..the acid and water separate as the battery discharges..also the chemical process is lessened when the air temps go below freezing by around 50% or more depending on the age of the battery..in extreme cold areas, external heat sources are required to keep engines warm enough to run..in alaska for example,the batteries are taken out entirely and put inside to keep warm..sometimes a fire pit is used to warm the engine from below (red hot coals no flame)..also in very cold weather, the engine oil will get very thick..in some cases the oil will actually glue the engine semi solid..locking it up..if its a cheaper oil that whathappens..I like 20 miles north of st louis in illinois and when it gets below 30 degrees outside i place a under cabinet 350 watt heater(used for keeping food warm to serve) upside down under my engine overnite..this keeps the block warm and the oil thinned out..and works very well for me..my car will start whe no one elses will in my neighborhood..hope tyhis helps you..

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Bmw 520,2003. heater solenoid stays hot and drains battery


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Apr 01, 2011 | BMW 525 Cars & Trucks

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Engine is over heating unless you turn on defroster, then the fans come on , however interior temp switch , appears not to be working, because it continues to blow cold air into the vehicle,


May just be low coolant level. Remove rad cap, or if none, coolant return bottle cap, and start engine and run heater while doing this. Now pay attention to coolant level and add as needed to top up the system. Let it run with cap off until rad fan comes on and off, 2 or 3 times and keep adding coolant if level goes down. Keep an eye on temperature gauge while doing this. It almost sounds like your coolant got low, or is low, and your heater has an airlock. Once coolant circulates back through heater and level is correct, see what happens.

Nov 03, 2010 | 2000 Ford Taurus

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When i turn the car off it sounds like a fan keeps running but it is not the fan


there is a cooling fan that cools the radiator that still runs after the car has been turned off

Nov 04, 2009 | 1996 Chrysler Sebring

1 Answer

My heater in the Mercedes c240 1999 car is not working well. One side of the heater (left hand side is ok) but the right hand side keeps on blowing out hot air even when it is on the cold setting. Any...


the control valve unit behind the dash either broke or stuck. the car has two set of control valves, one for passenger and on for the driver. It common for the unit to fail on all cars some has better luck than others. inside of the valves made out of rubber, over time if it not move regularly it can seized from heat and it get stuck and the motor may have a hard time turning and adjust the valves itself. the only way to get to it and work on it, the dash has to come apart. the part may be cheap if it need it, the bad part is time consuming getting to it and its all mechanic nightmare and the labor will get you. The fan keep coming on, you may have to change the thermostat switch sensor, it could be faulty and not sensing correct temperature causing the fan to stay running. at the same time I would go ahead and have the thermostat it self change, you will have replace that soon or later and you don't want the car leaving you stranded and overheating. by running the heater believe it or not, it also help cool down the the engine a bit. hope that help some

Sep 30, 2009 | 2000 Mercedes-Benz C-Class

2 Answers

Heater/AC fan motor keeps running after car is shut off


that's normal when hot, but should't run down the battery. if severly overheats ffnd/fix that problem. the other will probably dissapear . if not excessively hot then the fan heat sensor is faulty....

Jul 22, 2009 | 2001 BMW 325

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