Hey everyone, im getting a hissing sound coming from the cockpit of my vehicle when the a/c clicks on, when i accelerate it becomes more prominent, it almost sounds like when your filling a baloon with helium, very similar sound... I did not notice this last year and the only thing i can remember being worked on inside the engine bay was that turbo oil feed line done a couple of months back. There is warm air on the drivers side and cool air on the passengers side after running it for a long period of time. Its going in this Wednesday for a check up to see whats going on. I really hope it was nothing to do with that turbo line feed. Ill be loosing a days pay of work because of this but good news is that the warranty kicks in.. Ill keep you posted
More then likely, something went wrong somewhere the hissing sound was not there last year and its hard for me to believe that in one year it needs refrigeration gas. Tomorrow she'll go in for a diagnostic
Got the call back and they said no leaks in the system but it needed refrigerant gas. I am puzzeled, I'll keep an eye on it. Is there a possibility it was shipped from manufacturing with low gas?
I know is the Sonata when one side is warm and the other is cold it is the actuator flap for the dual climate controls that is broken. Do you have dual climate control on your SFS? Also there is no way a 2016 should be low on refrigerant, my 2011 still blows cold and has never had any added.
Negative. If it was left low at assembly it would have been that way from day one. Most systems will leak a very small amount so it would not be unusual for an older car to perhaps need to be recovered and charged. I do not see that as being the case in your situation, so I would guess there is a small leak somewhere that took time to bleed the system low enough for you to notice. I should add that when they recover the refrigerant the machine logs the exact weight of the refrigerant recovered, so they have absolute proof whether the system was low or not.
If you notice it happening again get back with the Dealer right away. There are two ways of searching for leaks. One is via an electronic sniffer that works well for large leaks and can work on smaller leaks. A lot depends on how small the leak is and how good the operator is.
The second way, at least for GM vehicles, is to add dye (UV or other) into the refrigerant and with that even very slow leaks will show over time. Dye generally works great on slower leaks and is why I prefer its use in a situation like yours.
The rough part about searching for leaks with either of those methods is that hoses and pipes may or may not be readily visible within the engine compartment. Some components like the condenser may also be hard to access or have clearances too tight to get a sniffer in there.
And the evaporator core is of course buried within the HVAC case so it cannot be seen without what is often major disassembly.
Ideally and hopefully...If Hyundai permits the use of dye...They installed it as a part of this service. If not it might have to be added on the second try. May or may not be any way to add dye how. If there is no dye charged out on your invoice you might want to check with the Dealer to see if Hyundai permits its use and if so whether they can added now even though the system is technically full. Once dye is added.... If the condition returns locating the leak "should" be pretty straightforward but could still be very time consuming if items have to be disassembled for access. Your Dealer might quote you to do this with the understanding that if a leak is found and it is a defect then all time would be covered.
That initial quote could be high. I do not know how much time is necessary to see all sides of the evaporator. On some GM models as an example it can be in excess of ten hours of labor and on some models you have to actually remove the windshield. Why? Well, the nice young engineers who designed everything have the HVAC case assembled and installed in the vehicle PRIOR to the windshield going in so they never recognized that the bolts that hold the instrument panel carrier together are too long to remove with the glass installed. I "think" that Hyundai is smarter than that unlike a lot of GM models since we can generally replace headlamp bulbs without pulling the front bumper fascias off, but.....One never knows....
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Turned on car again, noticed the hissing sound = no cold air divers side and colder on the passengers side. Its only been 3 weeks and a couple of days since it was recharged. Now im convinced that its just throwing out the freon gas out of somewhere. I called, its going in tomorrow morning and a day without a car again. Hopefully they pin point the problem this time and fix it. Im going to VA in a month and a half and i will need this to be working.. Ill keep you updated
Seen a lot of evaporators leak, last ditch effort before dash comes out would be my guess of what they are doing, standard though. They should of used dye from the get-go and now be able to pinpoint it, especially if the water out the drain hose under car glows under blacklight. bingo.
Im assuming that the condenser sits just behind the grille and in front of the radiator. The unit is totally exposed to flying hazards such as rocks. This reminds me of my 2005 Honda Odyssey in which I had to place a diamond mesh to make the openings of the lower bumper smaller. A rock had pierced the condenser and well, I replaced it. The grille slots are too wide as you may know so I will have this done asap even of its not the problem. Its not a bad idea to protect it a little better.
ID.....That's a pretty good sized leak to draw it down that fast. And yes, they should have added dye if Hyundai allows its use. If they didn't they may need to now and the cost to do that should be theirs, not yours.
They could also look for a leak with an electronic sniffer and with a leak that large they should be able to find it.
Discharge hose has been replaced, it is super cold inside the car but we will see if it holds assuming they found the leak. Oddly as my car was coming out another customer comes in and complained about the same thing. They open the hood ad say its the same discharge hose on her 2016 SF. Is this common?
Did they reimburse you for the recharge they previously did ? they should and to me it sounds like they didn't try all that hard to find the problem, if the hissing sound was from the leak then it not a small leak and often times there are traces of refrig oil at the leak site.
If the hose was leaking so badly that it hissed it would have been out of refrigerant in hours. As the HVAC gradually looses refrigerant you may hear a hissing sound as the refrigerant moves through the system.
The first step in diagnosing a HVAC refrigerant leak is normally to recover and recharge the system so that you can perform a decent leak test. I cannot answer why they did not find the leak the first time around as there is no way to know where / how visible the leak was. Had it been found on the first visit the total price "might" have been a bit lower but not all that much as once the leak was detected they would have had to recover the system again to make the repair and then recharge it. This two recoveries and charges no matter how you cut it. "Might" have been a bit lower in price depending on how they handed the price for the refrigerant itself.
So Greysave in your opinion the initial cost to the owner for the recharge shouldn't be covered under warranty - it's a newer vehicle and the problem was traced to a bad component.
I think he said the bad hose was in the discharge side, I've seen a couple times where leaks on the high pressure side only manifest themselves when the system runs and is under high pressure.
In any event I'd be fighting with the dealer/Hyundai to cover all of the costs associated with the issue.
Ah wait...I forgot this was handled as a warranty repair. As long as the vehicle was within warranty and this was not an after warranty Policy Adjustment / Goodwill then yes there absolutely should be reimbursement by either the Dealer or Hyundai. More than likely by the Dealer given the circumstances.
Sorry. I just completely overlooked the warranty coverage. Thanx for reminding me DTech!
was this the fix? did anything else happen afterwards? Please Update.
Similar situation. Refilled 1 week ago and I heard this "SSSSSSSS" hissing noise as soon as i kicked on A/C.
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