Question about 1996 Ford Windstar

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Heater in 96 windster blows cold air - 1996 Ford Windstar

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  • 17 Answers

First check coolant level if its full then you could have a temperature sensor or switch bad. not the temperature gauge sensor though.

Posted on Dec 10, 2012

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Posted on Jan 02, 2017

vmhreha
  • 77 Answers

SOURCE: air condition/heater

sounds like the air-conditioning expansion valve is probably not working correctly here is a way you can fix your air conditioning:

  1. Realize that auto AC is basically a refrigerator in a weird layout. It's designed to move heat from one place (the inside of your car) to some other place (the outdoors). While a complete discussion of every specific model and component is well outside the scope of this article, this should give you a start on figuring out what the problem might be and either fixing it yourself or talking intelligently to someone you can pay to fix it.
  1. Become familiar with the major components to auto air conditioning:

  2. the compressor, which compresses and circulates the refrigerant in the system
  • the refrigerant, (on modern cars, usually a substance called R-134a older cars have r-12 freon which is becoming increasingly more expensive and hard to find, and also requires a license to handle) which carries the heat
  • the condenser, which changes the phase of the refrigerant and expels heat removed from the car
  • the expansion valve (or orifice tube in some vehicles), which is somewhat of a nozzle and functions to similtaneously drop the pressure of the refrigerant liquid, meter its flow, and atomize it
  • the evaporator, which transfers heat to the refrigerant from the air blown across it, cooling your car
  • the receiver/dryer, which functions as a filter for the refrigerant/oil, removing moisture and other contaminants
  1. Understand the air conditioning process: The compressor puts the refrigerant under pressure and sends it to the condensing coils. In your car, these coils are generally in front of the radiator. Compressing a gas makes it quite hot. In the condenser, this added heat and the heat the refrigerant picked up in the evaporator is expelled to the air flowing across it from outside the car. When the refrigerant is cooled to its saturation temperature, it will change phase from a gas back into a liquid (this gives off a bundle of heat known as the "latent heat of vaporization"). The liquid then passes through the expansion valve to the evaporator, the coils inside of your car, where it loses pressure that was added to it in the compressor. This causes some of the liquid to change to a low-pressure gas as it cools the remaining liquid. This two-phase mixture enters the evaporator, and the liquid portion of the refrigerant absorbs the heat from the air across the coil and evaporates. Your car's blower circulates air across the cold evaporator and into the interior. The refrigerant goes back through the cycle again and again.
  2. Check to see if all the R-134a leaks out (meaning there's nothing in the loop to carry away heat). Leaks are easy to spot but not easy to fix without pulling things apart. Most auto-supply stores carry a fluorescent dye that can be added to the system to check for leaks, and it will have instructions for use on the can. If there's a bad enough leak, the system will have no pressure in it at all. Find one of the valve-stem-looking things and CAREFULLY (eye protection recommended) poke a pen in there to try to valve off pressure, and if there IS none, that's the problem.
  3. Make sure the compressor is turning. Start the car, turn on the AC and look under the hood. The AC compressor is generally a pumplike thing off to one side with large rubber and steel hoses going to it. It will not have a filler cap on it, but will often have one or two things that look like the valve stems on a bike tire. The pulley on the front of the compressor exists as an outer pulley and an inner hub which turns when an electric clutch is engaged. If the AC is on and the blower is on, but the center of the pulley is not turning, then the compressor's clutch is not engaging. This could be a bad fuse, a wiring problem, a broken AC switch in your dash, or the system could be low on refrigerant (most systems have a low-pressure safety cutout that will disable the compressor if there isn't enough refrigerant in the system).
  4. Look for other things that can go wrong: bad switches, bad fuses, broken wires, broken fan belt (preventing the pump from turning), or seal failure inside the compressor.
  5. Feel for any cooling at all. If the system cools, but not much, it could just be low pressure, and you can top up the refrigerant. Most auto-supply stores will have a kit to refill a system, and it will come with instructions. Do not overfill! Adding more than the recommended amount of refrigerant will NOT improve performance but actually will decrease performance. In fact, the more expensive automated equipment found at nicer shops actually monitors cooling performance real-time as it adds refrigerant, and when the performance begins to decrease it removes refrigerant until the performance peaks again.

Posted on Jun 05, 2008

  • 68 Answers

SOURCE: Heater blows cold air

change the heater core

Posted on Dec 21, 2008

jamaicanmech
  • 17 Answers

SOURCE: My 1999 Ford F150 Heater only blows out cold air

guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line

Posted on Jan 08, 2009

ifixgms
  • 64 Answers

SOURCE: Heater blows cold air.

heater cores clog in taurus. way to know is this--engine fully hot--heat on reach down to the fire wall and grab hold of one of the heater hoses where it hooks to the core--one should be real hard to keep hold of because its that hot. If the other is close to the same the core is not clogged. But if the other is cold to the touch its clogged. You can remove the hoses and shoot garden hose water in one side or the other and break it loose usually

Posted on Apr 07, 2009

Mike258
  • 1498 Answers

SOURCE: my heater only blows cold air-'98 ford explorer

Hi Bri,

That is usually the first symptom of low coolant. Not enough water in the system to circulate through the heater core. Has it been running hot?

Check the coolant level in the radiator

Best regards,
Mike

Posted on Sep 23, 2009

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It appears we have an Air lock scenario and you will need to perform a system Bleed.
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