Survey by Qualaroo
+ Reply to Thread
Results 1 to 7 of 7

Thread: Ice on A.C Pipe (City 2012) : urgent help

  1. #1
    Senior PakWheeler Follow
    waleed80's Avatar
    Join Date
    May 2006
    Location
    Rawalpindi
    Age
    36
    Posts
    6,690
    Follows
    2
    Following
    0
    Mentioned
    36 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default Ice on A.C Pipe (City 2012) : urgent help

    Hi. I own a while 2012 city since June 2012. Today I traveled from Bahawalpur to Rawalpindi to drop my parents. Started at 11 and AC was perfectly fine. However, the moment I got on Gojra motorway, its performance simply went pathetic. I was maintaining approximately 130 speed. After Faisalabad, I stopped at the motorway stopover and opened the hood to check the AC pipe. I found thaw thick ice had accumulated on the pipe. I know it's supposed to be cold and wet but the ice was thick like you find issue fridge freezers. I have to return back tomorrow morning and I'm worried. What can be the reason for poor performance all of a sudden and the thick ice.interestingly, AC has started working better again, but as I just reached, maybe the sun has gone and I feel so. Can it be a clogged pipe? Leaked gas? Attaching the pictures. Waiting for the answers

  2. #2
    Senior PakWheeler Follow
    usman_arooq2's Avatar
    Join Date
    May 2011
    Location
    Sialkot
    Posts
    1,437
    Follows
    0
    Following
    0
    Mentioned
    13 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    2
    Good Answers
    1

    Default

    can't comment about the reason of ice accumulation but the ice isn't a good conductor, thats why in areas below freezing temps, the water underneath the ice layer formed over it doesn't freeze as ice doesn't conduct the temperature difference well, same is the reason behind degraded performance of ac i guess.
    Bella, You give me everything just by REVing - NEONLIGHT SAGA: NEWTUBE

  3. #3
    PakWheeler Follow
    driveking's Avatar
    Join Date
    Mar 2015
    Location
    Sargodha
    Posts
    215
    Follows
    1
    Following
    0
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Maybe ur Ac compressor is not triping! Get it checked.


    |('}__ {Awargi!}
    |(_/\\_

  4. #4
    Senior PakWheeler Follow
    afnan.bashir's Avatar
    Join Date
    Jan 2013
    Posts
    1,994
    Follows
    5
    Following
    0
    Mentioned
    147 Post(s)
    Tagged
    6 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Icing of the suction line indicates too low suction pressure, which is a sign of not enough refridgerant inside the system. Sounds like a bad expansion valve or the system is overcharged.

    It's all about the temperature/pressure relationship, and how pressure affects the boiling point of the refrigerant. As the pressure of a refrigerant goes up, so too does the temperature and boiling point. When the pressure drops, the temperature and boiling point drop as well. Air conditioning (and some heating) systems take advantage of this, to cool (heat) the air inside a building.


    Normal system


    In a normal system, The compressor compresses the refrigerant vapor. This causes the vapor to be both high temperature, and high pressure. The hot vapor moves through the condenser coils, where some of the heat is transferred into the outside air. When the vapor finally comes out of the condenser, it's a hot liquid. The hot liquid moves through the liquid line, into the building towards the evaporator coils. Just before the hot liquid refrigerant reaches the evaporator, it's forced through a metering device. The actual device used depends on the system, but capillary tubes are common.


    When the hot liquid is forced through the metering device, the pressure drops substantially. The pressure drop causes the temperature and boiling point of the liquid to also drop. As indoor air is forced over the evaporator coils, the cold liquid refrigerant in the coils absorbs heat from the air. The heat causes the refrigerant to boil, which changes it to a low pressure vapor. When the refrigerant reaches the end of the evaporator, it's a cool vapor. The cool vapor travels down the suction line, and back to the compressor where the refrigeration cycle can start again.


    Low refrigerant


    When the refrigerant in the system is low, the pressure; and therefore temperature, of the refrigerant will also be lower. In a normal system, the temperature of the refrigerant at the beginning of the evaporator will be right around the freezing temperature of water (32?F). As the indoor air moves over the cool coils, the moisture in the air will condense on the coils. This condensation will drip harmlessly off the coils, and into the condensate drain.


    When the refrigerant is low, the temperature of the refrigerant at the beginning of the evaporator coils will be colder than the freezing point of water (less than 32?F). Because the coils are so cold, the condensation that forms on the coils will freeze. As ice builds up on the coils, it restricts the air flow through the coils. Because of the restriction, the refrigerant can't absorb as much heat from the the indoor air moving over the coils. This causes the refrigerant to boil later in the evaporator, which causes ice to form further along the coils. This situation continues to progress, until the whole evaporator is a block of ice. Once that happens, the refrigerant will start to boil in the suction line. This cause the temperature of the suction line to drop, and just like in the evaporator, cause the condensation to freeze.


    Eventually the freezing works its way all the way back to the compressor, which is where the trouble can really start. If allowed to operate in this condition for too long, liquid refrigerant can make its way back to the compressor. If this happens, the compressor can be damaged.


    It should also be noted. Once the refrigerant level drops too low, the system stops working. So this problem only occurs in a "sweet spot", where the refrigerant is low, but not too low.
    93 Accord CB7 (Sold) / 2005 CL7

  5. #5
    PakWheeler Follow
    thekhanlala's Avatar
    Join Date
    Feb 2011
    Location
    Multan
    Posts
    919
    Follows
    2
    Following
    0
    Mentioned
    19 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    1
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Quote Originally Posted by waleed80 View Post
    Hi. I own a while 2012 city since June 2012. Today I traveled from Bahawalpur to Rawalpindi to drop my parents. Started at 11 and AC was perfectly fine. However, the moment I got on Gojra motorway, its performance simply went pathetic. I was maintaining approximately 130 speed. After Faisalabad, I stopped at the motorway stopover and opened the hood to check the AC pipe. I found thaw thick ice had accumulated on the pipe. I know it's supposed to be cold and wet but the ice was thick like you find issue fridge freezers. I have to return back tomorrow morning and I'm worried. What can be the reason for poor performance all of a sudden and the thick ice.interestingly, AC has started working better again, but as I just reached, maybe the sun has gone and I feel so. Can it be a clogged pipe? Leaked gas? Attaching the pictures. Waiting for the answers
    Waleed Sahab, get your A/C Gas checked. It happens if you have low (almost half or less) Gas present. In this symptom initially A/C works well but for just 20-30 minutes then it stop chilling. Don't use A/C until problem is fixed and get its Gas checked from some reputed workshop. Also if Gas Level is decreasing then do check for any leakage as well else you will again encounter this issue.

    Best of luck with your fix
    "May God keep you away from the venom of the cobra, the teeth of the tiger, and the revenge of the Afghans." ~Alexander the Great.

  6. #6
    PakWheeler Follow
    adeel7771's Avatar
    Join Date
    May 2015
    Location
    Islamabad
    Posts
    73
    Follows
    0
    Following
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    i have the same problem with my cultus 2007, works good for first 15 mints but after that cooling start to decrease,
    also can anybody tell me where to find (located on car)triping sensor?

  7. #7
    Senior PakWheeler Follow
    waleed80's Avatar
    Join Date
    May 2006
    Location
    Rawalpindi
    Age
    36
    Posts
    6,690
    Follows
    2
    Following
    0
    Mentioned
    36 Post(s)
    Tagged
    1 Thread(s)
    Problems Posted
    0
    Problems Solved
    0
    Best Answers
    0
    Good Answers
    0

    Default

    Came back the next day. Worked perfectly from rawalpindi till bahawalpur. Had plan to get it checked here but it was awesome. What the hell?

+ Reply to Thread

User Tag List

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •