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1997 BMW 540i Heating System

I have a 1997 BMW 540i & the only way I can get heat from the car is by using the windshield defrost system. When I turn the heat on, only cold cool air comes out. Am doing something wrong?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

Suraido
  • 195 Answers

SOURCE: 1999 bmw 540i automatically shuts off

It sound dumb, but check if both battery posts are OK. Pull on both of them one after the other to make sure they wont budge at all. Cause i had this problem once where the negative post had broken, but inside the battery where the post and the plates that make up the battery's cells become one. But since the post was still sitting in the battery, it touched just enough to give the car juice to start and all, but when i hit a big enough bump, the post jumped up so the car had no more ground, and with no ground to work with, the spark plugs can't make any fire so the engine dies apparently for no reason. So even if it sound weird or dumb, check that out first cause it would be the thing that makes you search the longest. If everything regarding the battery is fine, then i'm guessing a problem with a body ground or grounding strap somewhere. Might either be the grounds regarding the engine that give it the possibility to fire and such, or might be the grounds and/or fuses and connectors that make the car's onboard computer work.

Posted on Jul 08, 2009

emissionwiz
  • 74987 Answers

SOURCE: BMW 328i 1997 - Smell 'oil cylinder burning"

You have oil leaks getting on the exhaust system, they are getting into the car, have the car checked over to find source of leaks.

Posted on Oct 31, 2008

  • 1 Answer

SOURCE: 2002 BMW 540I air/conditioner not blowing air at all.

It is the Final Stage Unit/Blower Motor Resistor - changed mine and the problem never came back. After two tows and drained batteries. Most mechanics don't seem to put this one togther - you have to demand it. Funny because it is a VERY COMMON problem in BMW.

Posted on Dec 22, 2008

bmw_tech_38
  • 113 Answers

SOURCE: BMW Keyless Entry not working

hi, to program the keys to the vehicle is quite simple

1) open the vehicle, sit inside and close the door

2) insert the key in the ignition and turn to position 1 so that just the air bag light illuminates

3) press and hold the unlock button on the key and remove the key from the ignition (do not release the unlock button)

4) while still holding the unlock button with the key removed press the lock button 3 times

5) release the unlock button on the remote and the door locks should lock and unlock if the proceedure has been carried out correctly

6) to program any other key(s) press and hold the unlock button on remote and again press the lock button 3 times but do not insert it into the ignition or turn the ignition on as done previous.

you may want to print these instructions and read them a few times before proceeding, if you muck up the process while programing keys, no harm will be done, you just have to start the process over. hope this is of some help, regards mark.

Posted on Apr 10, 2009

  • 87 Answers

SOURCE: 1995 BMW 540I starts well cold, then dies out

I would check the fuel pressure just after starting and again after 10-15 minutes (or before it dies). Sounds like a fuel delivery problem. Could be a stuffed up filter, or the fuel pump could be dying. I had a Volkswagen some years ago and it had two fuel pumps, a large one up in the engine bay and a small "helper" in the gas tank. The one in the gas tank was bad but the bigone was fine, so I'd start the car normally, drive for about 20 minutes, then the car would die and not want to start again until it had cooled off. Maybe you have the same setup.

Posted on Jun 11, 2009

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1997 honda accord heating and defrost stopped working and doors unlock itself Not the fuses Please help


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The average cost for a Catalytic Converter Replacement is between $552 and $1097. Labor costs are estimated between $196 and $248 while parts are priced between $356 and $849.Get a personalized estimate based on your location and specific car. Estimate does not include taxes and fees.
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BMW e 39 Free Workshop Manual


BMW 5 Series (E39) Service Manual: 1997-2002
2003 ' Bentley Publishers ' English ' ISBN: 083760317X ' Pages 1002 ' File type: PDF ' 44.37mb

This Bentley Manual is the only comprehensive, single source of service information and specifications for BMW 5 Series (E39) cars from 1997-2002. Whether you're a professional technician or a do-it-yourself BMW owner, this manual will help you understand, maintain, and repair every system on 5 Series cars.

BMW 5 Series (E39) Service Manual: 1997, 1998, 1999, 2000, 2001, 2002
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Jul 29, 2012 | BMW 525i Cars & Trucks

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1994 bmw 525I over heating and it's not the radiator what do I do


Normally overheating is caused by a leak in the cooling system . Do a pressure test on the system to determine where the leak is. In car heater core is a possible place for a leak. Is there a sweet smell in the car when the heater is on , or fogging on the windshield. Also check the auxillary cooling fan.

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Heat does not come out passenger side of the car but comes out drivers side


There is a blend door problem.

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prev.gif next.gif HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

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I heard a pop noise & saw smoke then seen that the car was over heating. so i pulled over stopped turned the car off , looked underneath & antifreeze was just poring out.


Sounds like you blew a radiator hose or a cooling system component. Find out where the water is coming from and repair it. You dont need to use antifreeze to find out where the leak is but once you get the system to hold water, you do need to put antifreeze back in. Also check the cooling fan to be sure it is working properly and the car is not over heating.

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