HEIL AC Model N4A660GKA101 Refrigerant leak


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Old 05-19-24, 12:46 PM
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Angry HEIL AC Model N4A660GKA101 Refrigerant leak

Hi DIY community,

I have a HEIL Model # N4A660GKA101, Serial # E151115590 Air conditioning unit which has been leaking refrigerant. I had added
  • 14.5 Lbs. of refrigerant R410A in July 2022 and
  • then again 6.5 lbs. of R410A last Summer along with a leak sealant in June 2023;
Now the tenant is calling again and saying that the AC is not cooling , so looks like the leak sealant did not work as expected.

Any suggestions on how to find the leak and potential fixes? what should be my next steps...please advise.

Thank you!
 
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Old 05-19-24, 01:22 PM
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My HVAC contractor uses a refrigerant detector. Your next step will be better determined after you find the source of the leak. If it's in an easy place to repair you could be lucky but if it's something like the coil it can be a different matter.
 
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Old 05-20-24, 05:53 AM
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Thank you...I have my HVAC contractor coming today to diagnose and detect the leak...I will keep you posted on what they say. The cost of refrigerant has been on the rise and $85/lb for R410A it has cost me alot of money. Any thoughts on current price of R410A refrigerant per pound? Thanks!
 
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Old 05-20-24, 08:46 PM
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It had been fairly stable in price ....... +/- $49lb.
However.... it has doubled to +/- $90lb in 2024.
That is the current going price.

Leak sealants are not recommended.... however they are used anyway.
They are good for small leaks..... not wholesale leaks like you have.

Heil condenser - mfd. November 2015
Your tech should have absolutely no problem finding the leak.
Repairing it is another issue.
 
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Old 05-23-24, 05:52 PM
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Thank you, Pete. We are going to replace the evaporator coil and see if that fixes the leak...the tech. was unable to detect the leak...guess all of the refrigerant has leaked out already...Fingers crossed and hoping that fixing the coil will fix the issue...will keep DIY folks posted...thank you for the R410A pricing info.
 
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Old 05-23-24, 07:32 PM
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He should have only needed to put a small amount of refrigerant in.
In your case with that large leak..... he should have charged the system with nitrogen and used a squirt bottle of soap and water.

The leak could be as minor as a bad valve seal.
Hate to replace a $1000 coil based on a hunch.
 
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Old 05-29-24, 09:09 AM
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Hello all, just as update here are the pictures of the coil (copper) badly corroded and most likely the source of the leak; new aluminum coil has now been installed and hoping no more leaks.

 
 

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