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Why doesn't my A/C get cold? Start Here.

14695 Views 16 Replies 15 Participants Last post by  Bob McKay, 
electro
A number of things contribute to a properly operating A/C. The purpose of this thread is to help you get the type of help you need based on your A/C issues.


  • -The system must be full of refrigerant. If the compressor is cycling excessively (click on, click off, click on, click off), The A/C system is most likely low on charge. Typically there is a leak in the system that has depleted the refrigerant. You might consider the use of dye to help find the leak. Often the aid of an A/C professional is needed when finding and fixing leaks. http://www.fordforumsonline.com/for...ooling-systems/155-c-clutch-clicking-off.html

  • -There must be air flow both inside and under the hood. The A/C condenser needs air moving across it at any time the A/C is active. If the electric cooling fan(s) or fan clutch are faulty, A/C performance will be diminished, especially at an idle. The inside blower fan must also be working to distribute the cold air.

  • -The temperature blend door must be positioned correctly. If the A/C system is full of refrigerant and operating correctly, yet heat is being delivered, the blend door should be suspected. To a lesser degree, the heater valve might also be faulty.

  • -The air distribution system must work properly. If all the air flow is only delivered at the defroster vents, the vacuum source needs to be investigated. A faulty mode door vacuum diaphragm can cause insufficient air delivery to the dash vents, while other air flow remains good.

If you wish to find additional detailed info about A/C this link might be helpful.
http://www.fordforumsonline.com/for...oning-cooling-systems/61-how-does-c-work.html




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R
electro said:
A number of things contribute to a properly operating A/C. The purpose of this thread is to help you get the type of help you need based on your A/C issues.


  • -The system must be full of refrigerant. If the compressor is cycling excessively (click on, click off, click on, click off), The A/C system is most likely low on charge. Typically there is a leak in the system that has depleted the refrigerant. You might consider the use of dye to help find the leak. Often the aid of an A/C professional is needed when finding and fixing leaks. http://www.fordforumsonline.com/for...ooling-systems/155-c-clutch-clicking-off.html

  • -There must be air flow both inside and under the hood. The A/C condenser needs air moving across it at any time the A/C is active. If the electric cooling fan(s) or fan clutch are faulty, A/C performance will be diminished, especially at an idle. The inside blower fan must also be working to distribute the cold air.

  • -The temperature blend door must be positioned correctly. If the A/C system is full of refrigerant and operating correctly, yet heat is being delivered, the blend door should be suspected. To a lesser degree, the heater valve might also be faulty.

  • -The air distribution system must work properly. If all the air flow is only delivered at the defroster vents, the vacuum source needs to be investigated. A faulty mode door vacuum diaphragm can cause insufficient air delivery to the dash vents, while other air flow remains good.

If you wish to find additional detailed info about A/C this link might be helpful.
http://www.fordforumsonline.com/for...oning-cooling-systems/61-how-does-c-work.html



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mauryfrench
Good day.

I found that all the links in this Reference are not valid links anymore. Just wanted to point it out in case you wanted to remove the reference, or call me a dumba$$ and tell me what I am doing wrong.
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M
There are a few air conditioning repairs that you can manage on your own. This stands true only if you have some basic problems. Most of the times AC unit's cooling effect decreases. If that is the case with you, then you can clean the compressor unit and debris from underneath it. Clean out AC filters.
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J
I think your AC need a service because in summer you probably turn the AC on all the time ans it doesn't given the time to be on rest, and you one thing more that Air conditioner is a machine ans machine needs regular repair, so you must call a professional AC repair man and ask him to check why the AC is not cooling the room.
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John Renold
I think your A/C needs recharging. The most common cause of an air conditioner not getting cold enough is that it needs to be recharged. You can do it by yourself otherwise contact ASE certified mechanics
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M
Jarome Iginla said:
I think your AC need a service because in summer you probably turn the AC on all the time ans it doesn't given the time to be on rest, and you one thing more that Air conditioner is a machine ans machine needs regular repair, so you must call a professional AC repair man and ask him to check why the AC is not cooling the room.
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I am 100% agree with you Mr jarome, proper maintenance of AC unit is very necessary for better heating and cooling.
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K
Most of the central air conditioners have two components namely the condenser and the evaporator. The condenser of an ac unit is located mostly on the outer side of the house. The condenser and the evaporator in your ac unit are sealed well. You should call only a professional air conditioning repair man for getting your air conditioner repaired or serviced.
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I
The main component of an ac unit is its compressor, which performs most of the tasks while an ac is running. Most of the times problems like cool air not blowing from an ac often occur due to a faulty compressor. While you perform an air conditioning repair, you should also clean out your compressor thoroughly
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Action
Debris inside the system many times will clog up the orfice tube (for systems that have an orfice tube and most modern ones do) that will gradually diminish the effectiveness of the system.
An orfice tube is very cheap and my recommendation is every time the system is opened up to replace the orfice tube! Every time.

>>>>>>>>>>>>>Action
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M
A perfectly working air conditioning unit requires a lot of attention. You need to keep an eye on its vents and filers so that you can get them cleaned and replaced whenever required. Getting the AC Service done from time to time is another thing that needs to be performed for a perfectly working ac unit
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J
One of the most common complaints from people during peak summers is that the Air Conditioner is not cooling effectively or the compressor is not working. It is not always a technical fault that may lead to less cooling or an ineffective AC. One should make sure that the sizing is done properly and the AC (ODU/external part) is not placed in a very hot environment, as it reduces its efficiency and leads to improper cooling.
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R
For the next poor soul that comes wandering into this discussion and struggles to find the rest of the information on A/C troubleshooting... here are updated links to the same forum locations and posts as referenced in the OP.

http://www.fordforumsonline.com/threads/test-an-a-c-cycle-switch.303/
http://www.fordforumsonline.com/threads/howto-check-your-fuses.128/
http://www.fordforumsonline.com/threads/howto-check-a-relay.144/
http://www.fordforumsonline.com/threads/check-a-ground.90/
http://www.fordforumsonline.com/threads/the-compressor-clutch.7601/

http://www.fordforumsonline.com/threads/a-c-clutch-clicking-on-and-off.155/

http://www.fordforumsonline.com/threads/how-does-an-a-c-work.61/

FWIW, HTH :)
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electro said:
A number of things contribute to a properly operating A/C. The purpose of this thread is to help you get the type of help you need based on your A/C issues.


  • -The system must be full of refrigerant. If the compressor is cycling excessively (click on, click off, click on, click off), The A/C system is most likely low on charge. Typically there is a leak in the system that has depleted the refrigerant. You might consider the use of dye to help find the leak. Often the aid of an A/C professional is needed when finding and fixing leaks. http://www.fordforumsonline.com/for...ooling-systems/155-c-clutch-clicking-off.html

  • -There must be air flow both inside and under the hood. The A/C condenser needs air moving across it at any time the A/C is active. If the electric cooling fan(s) or fan clutch are faulty, A/C performance will be diminished, especially at an idle. The inside blower fan must also be working to distribute the cold air.

  • -The temperature blend door must be positioned correctly. If the A/C system is full of refrigerant and operating correctly, yet heat is being delivered, the blend door should be suspected. To a lesser degree, the heater valve might also be faulty.

  • -The air distribution system must work properly. If all the air flow is only delivered at the defroster vents, the vacuum source needs to be investigated. A faulty mode door vacuum diaphragm can cause insufficient air delivery to the dash vents, while other air flow remains good.

If you wish to find additional detailed info about A/C this link might be helpful.
http://www.fordforumsonline.com/for...oning-cooling-systems/61-how-does-c-work.html



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I have many years as a tech and Instructor and have checked all of the above and more. I am truly baffled by this unit. Thus my post. Several techs including one ford tech have been consulted with no new ideas. I am hoping one of the members has seen a similar problem and it's solution.
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R
Thanks for the advice, I live in the south and it can get pretty hot in the summer, had this problem before and it cost big to fix it. Appreciate the guidance
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B
John Renold said:
I think your A/C needs recharging. The most common cause of an air conditioner not getting cold enough is that it needs to be recharged. You can do it by yourself otherwise contact ASE certified mechanics
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I always have had a issue during the summer with my A/C not getting very cold during the summer and this always helped.
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Rick N. Morty said:
Thanks for the advice, I live in the south and it can get pretty hot in the summer, had this problem before and it cost big to fix it. Appreciate the guidance
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Love the username.
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