Gurgling/Ticking noise from Heater Core and Compressor - Please Help
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Gurgling/Ticking noise from Heater Core and Compressor - Please Help in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hi, Thanks for reading. I have provided as much information as possible to get as best diagnoses from the community ...
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    E-Man is offline Cadillac Owners Member
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    Unhappy Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    Hi,

    Thanks for reading. I have provided as much information as possible to get as best diagnoses from the community and I have done some research before posting.

    This issue slowly progressed. It first started when I used to hear a little bit of bubbling noises from the heater core once in a while. After a heat-wave we have had recently, this has progressed into a gurgling noise coming out of the heater core that is somewhat subtle when idle but becomes almost a small roar when the RPMs are increased while driving. Just before it progressed into this gurgling, I noticed that while idle (for example at a red light), the AC would blow hotter air, and would again get cool a little bit when continuing to drive.

    At first I thought it was a defective heater core but when I opened the hood it was clear that the issue is also related to the outside. Slight loss of power is also experienced when the Heat/AC is turned on but this may be completely normal. This only occurs when the Heat/AC is turned on and it is possible to eliminate the noise and power loss by shutting down the Heat/AC.

    Does anyone know exactly what the issue here is? I know that the obvious response here is that the compressor is in need of replacement, but what I have noticed is that ever since my Freon (or whatever the liquid is called these days) has gotten lower and lower and the AC air started to get hot, this is when the gurgling began which leads me to believe that it may just need a refill and that the compressor is making the noise because it is trying to process without having any Freon, kind of like our stomach growls when hungry and has nothing to process!

    Thanks again for reading.

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    Argent1's Avatar
    Argent1 is online now Cadillac Owners Connoisseur
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    That would be a good place to start. Get the system checked, before you burn out the compressor, if it's not too late.

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    E-Man is offline Cadillac Owners Member
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    I appreciate the reply, but besides getting it checked is there anything I can do myself to diagnose this? At this point my only test would be to refill the AC and hope the loud ticking noise that occurs when the AC/Heat is on goes away but I don't want to buy the kit for nothing. Hopefully someone has a technical suggestion...

    Any techs chiming in?

    Quote Originally Posted by Argent1 View Post
    That would be a good place to start. Get the system checked, before you burn out the compressor, if it's not too late.

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    E-Man is offline Cadillac Owners Member
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    Anyone?

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    Argent1's Avatar
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    Even up here the refill kit is only $2.99.

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    E-Man is offline Cadillac Owners Member
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    Quote Originally Posted by Argent1 View Post
    Even up here the refill kit is only $2.99.
    I have to say, $2.99 is rather impressive. I don't recall ever seeing a refill kit here in Toronto Canada for around that much, unless I am out of the loop.

    Question: Is gurgling/ticking from the compressor a common symptom when it gets low? I believe this would be my answer and keeping my fingers crossed!

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    Hockey Nut is offline Cadillac Owners Member
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    Re: Gurgling/Ticking noise from Heater Core and Compressor - Please Help

    E-Man
    Some suggestions for you. The Compressor doesn't make gurgling sounds. You have to put at gauge set on both the High and Low access ports first thing to see what the pressures are. You may have lost some of the 134A refig. or not. The Heater core and the Evaporator are separate heat exchangers. This car should have a Low Press. Cutout on the suction line to protect the pump. If the pump is running, feel the suction line out of the Evaporator and see if it is cold . What is the condition of your heating system? Sounds like you arelow on Glycol and have air in the heat side.Take it in to Can. Tire or any qualified shop and get it properly diagnosed,Don't try to run the A/C if it blows cold intermitantley. Don't try to put more 134 in it if you are not sure how to do it correct and Safe.

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