HVAC A/C Issue?

Discussion in '7th Generation (2003-2008) [Acura TSX]' started by Bear1, Wednesday 13th May, 2015.

  1. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Hi everyone, I noticed recently that when I turn the AC on it gets pretty cold in the car but then after a few mins the air begins to get warm.
    Turning the AC off and then back on again gives me back the cool air but then after a few more mins the same thing will happen.
    The compressor is clicking on so I quite sure that is working fine.
    Is this an issue or is the AC taking a break every few mins and then going back on?
    When I try to wait and see what happens it just stays warm unless I turn it off and on again.
     
  2. ArcticFire-Account Closed Banned Getting Started

    Scotland Graham Scotland
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    Best way to check is to set the temperature to low, manually turn the fans on to max and turn on the recirculation button otherwise outside air temp will effect it.

    If blowing warm then could just need a recharge. If there's no leaks but a recharge doesn't sort it then it could just be a faulty relay like mine was.
     
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  3. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Ok, I have it always set on AUTO, does this have an affect on the how the AC operates? Or does that just allow both the passengers to regulate their own temp?
    I also never have the recirc button on so I'll try this also.
    Yeah it starts blowing warm air after a few minutes of having it on :/
     
  4. Ichiban Founder Staff Team

    England CJ Leeds
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    I think you need to a vacuum and regas to see what happens.
     
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  5. ArcticFire-Account Closed Banned Getting Started

    Scotland Graham Scotland
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    Auto button will make it click on and off except when the temp is set to low where it should blast on full. The recirculation should automatically come on also when set to low, some cars wait until a cooler cabin temp is reached before switching off the recirculation (not good to keep it on all the time).

    Basically auto is just that, it will automatically maintain the set temp hence the air con coming on off. But I suspect a recharge.
     
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  6. Beefy Expert Advisor ★ ★ ★ ★ ★

    United Kingdom Stoke
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    690
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    Sounds like the gas level is low. You may find the compressor kicking in quite frequently to try to keep the pressure up. As it is running the pressure is high enough to give a good level of cooling. However the compressor can only run for so long until it would overheat. When it cuts out the pressure drops more quickly as there is a low level of refrigerant and the temperature raises.
     
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  7. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Ok so on the way home I decided to fiddle around with it. I put the temp on low (which in my car doesn't put the AC on) and put the ac on manually on full blast.
    Turned off the auto and keep the recirc on.
    Not once did the ac get warm and stayed nicely cool all the way home.
    Weird.
     
  8. ArcticFire-Account Closed Banned Getting Started

    Scotland Graham Scotland
    3,521
    1,051
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    Could it be the cabin temp sensor? There should be a little semi covered hole just under and to the side of the steering wheel, perhaps check for blockages?
     
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  9. Nighthawk Guest

    United Kingdom Richard Milton Keynes
    5,369
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    @Bear1 - when was the last time the system was regassed. As already mentioned a couple of times already, its sounds like its low on gas. The system needs to be purged and refilled. The gas naturally seeps out of seals over the years.
     
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  10. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    I'll be having the system pressure checked soon anyway as we are going to Italy during the summer. So I'll do other relevant checks as well. Thanks everyone.
     
  11. Ichiban Founder Staff Team

    England CJ Leeds
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    Have you got a regas done yet?
     
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  12. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Hi, sorry it has been hectic in the house all week as I just became a father :Smile:
    Anyway, in the end there was no need as the AC was working perfectly. What happens is that it cools down then after a while it takes a "rest" and then a few mins later the ac goes back on.
    It's ICE cold also.
     
  13. Zebster Expert Advisor ★ ★ ★ ★ ★

    United Kingdom .
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    There is a sight glass on the compressor (on diesel models, at least). You can tell if the system is running low on refrigerant by how much gas is passing the window... it should be almost all liquid, with very little turbulence/gas seen. Every now and then I have to get the odd 100g of R134a/oil mix added by a local HVAV specialist in order to keep the system topped up, which costs very little (but I accept this isn't the recommended way of maintaining the system).

    Kwik-Fit often have good deals if you fancy having it done properly (do they have these in Ireland?). Despite their generally poor reputation, the machines they use are fully-automated and completely vac down the system before adding the exact amount of R134a/oil needed. Just don't let them advise you on brakes or shock absorbers!
     
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  14. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Thanks for the advice, sorry for the late reply also :Smile:
    System has been pressure checked, emtpied and refilled and all working fine.
    So I believe the issue can be put to rest :Smile:
     
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  15. JapCar Club Member ★ ☆ ☆ ☆ ☆

    On my 2007 ICTDI AC doesn't work properly- cold air (about 10 Celsius) is blowing just at driver side, at the passengers side blowing not cold (about 15 Celsius). I checked AC just for few minutes, outside temperature was probably 15 Celsius...
    In the sight glass I see just turbulence when compressor is running, when it is stopped I don't know if I see liquid or nothing...
    Is it the only criteria for good working AC "it should be almost all liquid, with very little turbulence/gas seen" ?
    Do you think refrigerant is insufficient and after refill the system my issue would be solved? I ask because for this issue responsible could be flap motors or temperature sensors as well.

    Bear 1, Where did you refill your system and how much it costs?
     
  16. SpeedyGee Administrator Staff Team

    England Speedy Birmingham
    14,999
    5,595
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    @JapCar it's customery to post an introductory post in the Introduce Yourself telling us a bit about yourself and your car before laucinhing into asking for help.

    A/C topup is usually £40-£50 region although some places ask for upto £70.
     
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  17. Zebster Expert Advisor ★ ★ ★ ★ ★

    United Kingdom .
    2,559
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    Obviously that isn't the only criteria, but it is a good indicator that you have sufficient refrigerant in the system... it sounds like you are a little low. As Speedy said, it isn't expensive to have the system sucked down and re-filled. If you do know a friendly HVAC guy then you could try getting him to simply adding refrigerant in 100g amounts, as your system is still under pressure and won't have become contaminated with water BUT this does come with some risk, so don't do this if you are a bit nervous about cutting corners.

    The control unit has built-in diagnostics to assess sensors, etc, and the Honda workshop manual does have this useful guide...

    SEA3E50K71100000000BBAT00_4.
     
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  18. Bear1 Club Member ★ ☆ ☆ ☆ ☆

    Ireland Kevin Galway
    67
    6
    Hi Japcar - I think coming to my location to have your AC checked wouldn't be too cos effective :Wink:
    In any case it doesn't cost much whether it is in Euro or GBP. Generally a gas fill up, cleaning etc sets me back about 40e.
     
  19. JapCar Club Member ★ ☆ ☆ ☆ ☆

    Sorry, my fault, I just did it.
     
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  20. JapCar Club Member ★ ☆ ☆ ☆ ☆

    Thanks, I will try this test.
    Is this well known HVAC Self diagnostic test or it is different?
    Does this test work for facelifts with navigation display?
    - - - Updated - - -
    Sorry I didn't understand what do you mean...I am in Bristol
    :Smile: