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Infiniti qx56 blows cold air instead of hot

I am getting cold air insteat of hot and the temp is set at 9

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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

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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

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  • 4 Answers

SOURCE: 2001 pt cruiser no heat

did you check the fluid level by removing the rad. cap? Radiator should be full to top. If Chryslers are low on coolant, the heater will not blow warm air.

Posted on Jan 04, 2009

  • 217 Answers

SOURCE: '98 S-10 heater blowing cold air - not hot air

will the air flow switch from floor to the mid to defrost? if so then we have a problem with the tempature door actuator. easy to replace just in tight place. Keep me posted for more help or if this was any help thanks

Posted on Jan 31, 2009

  • 497 Answers

SOURCE: driver's side air blowing warm, won't change

Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

Posted on Aug 29, 2009

  • 416 Answers

SOURCE: heater blows hot air for awhile but than blows

check coolant level in radiator and coolant bottle sounds like it may be low on coolant

Posted on Feb 09, 2010

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1 Answer

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Blows cold air turn heat on


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Hot air from drivers side cool air from passenger side


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1 Answer

Montana ac problem


some external sensor has taken a knock etc
sounds like its not getting whats going on outside
or the evaporator has an issue with its drains
perhaps something in the air intakes

Dec 23, 2014 | 2001 Pontiac Montana

1 Answer

Heater stopped working. It still will blow out cold air but no hot air.


It may be your thermostat. When they go out the heat stops. If you rev the engine a bit, or on the highway, if it comes back; you may need a thermostat.

Mar 12, 2014 | 2010 Infiniti QX56

1 Answer

J30 not blending hot air into cold. Blows only cold. heater core is hot


What kind of setting do you have? is it turn knob, push button or something else?

Feb 06, 2013 | 1997 Infiniti.5 J30

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Auto theft device on and car will not start Infiniti G35


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http://alltypesofpartsreplacing.blogspot.com/2012/12/heater-not-blowing-coldno-hot-air-from.html

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2 Answers

I replaced the blower motor in my 05 infinity qx56 but the air is still not blowing...any suggestions?


sounds like you may have a blown fuse check the fuses under dash and under the hood. look in the owners manual

Mar 17, 2011 | 2005 Infiniti QX56

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