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ProfessorX

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Discussion starter · #1 ·
Hello!

I am confused about what to do next, so I am writing to ask for advice.

I have a five or six year old Coleman HVAC system. I bought this five year old new construction house three years ago. I imagine the developers took the cheapest bid and bought the cheapest unit when installing my HVAC. I'd be happy to provide the HVAC model numbers if that would help anyone answer my questions.

In any case my system appears to slowly leak freon R22 from somewhere. The Condenser is on my roof deck, and the HVAC is five floors down in my basement and there is a small and a large line set connecting them. I have had the same tech come back twice in two years, and he can not find the leak by looking for oil spots and using soapy water. Last year they recharged my freon, they could do that again but it is very expensive and prices of freon are going up.

He wants to do a pressure test with nitrogen, but that is also expensive, and he thinks the leak is probably in the larger line set since he thinks it would have had to have been cut somewhere. But since it is a a very slow leak he says it is possible that the pressure test will not show anything. He says my R22 is at half the level that it should be at since he refilled it last year.

So I guess that my options are to (1) do the pressure test and make repairs? or (2) replace the coils in the basement and the condenser on the roof and install a new line set that runs on the outside of my house? or (3) replace the whole system? Or (4) not sure what?

I talked to a guy who says that my third floor gets poor circulation because I don't have a fan with a variable speed. Would a variable speed fan give my system better circulation?

Any advice or input would be greatly appreciated. I am quite confused about what to do. Thanks!
 
Confirm its not the indoor coil which is a huge problem in the industry- For line sets we simply pump system down and isolate suction and liquid line- pull vacuum with micron gauge-if lines check OK the rest should be really does not take a huge amount of time-R-22 5 or six years ago, what a waste- Low Bid
 
Discussion starter · #4 ·
5 or 6 years ago does not even sound rite on new install and being r22
The house was originally completed and sold in Dec. 2008. Sorry if my years were slightly off. My best guess is that the developer bought the HVAC units on clearance because they used r22 and they were happy to cut those and other corners to make more $$ for themselves. The actual coils in the basement say they could also take r410a, but not the condenser on my roof.
 
5 or 6 years ago does not even sound rite on new install and being r22
R22 units wee still made in 2009(5years ago).

Good chance indoor coil is leaking. If the tech had an electronic leak detector, he could probably find it much quicker.
 
Discussion starter · #6 ·
Confirm its not the indoor coil which is a huge problem in the industry- For line sets we simply pump system down and isolate suction and liquid line- pull vacuum with micron gauge-if lines check OK the rest should be really does not take a huge amount of time-R-22 5 or six years ago, what a waste- Low Bid
Thanks! I will try to figure out how I can get that checked.


R22 units wee still made in 2009(5years ago).

Good chance indoor coil is leaking. If the tech had an electronic leak detector, he could probably find it much quicker.
Yeah I need to find a tech that uses one of those I guess. All the places I called so far just want to show up for a service charge and don't want to talk to me in detail about what kind of equipment they will use to diagnose my problem.
 
Discussion starter · #8 ·
Thanks again to everyone for your help! I need to find a tech with electronic R22 detection equipment, and I guess I'll also ask upfront what they charge for an R22 refill per lb.
 
Since everyone keeps telling me to use a leak detector, may I ask if this one is any good to detect R22?

http://www.harborfreight.com/electronic-freon-and-halogen-leak-detector-92514.html
Electronic Freon And Halogen Leak Detector
Pittsburgh Automotive - Item#92514

Does it matter which one is used? Thanks!
no...

it MAY be able to find a leak... but it's not a recommended tool.
those are for cars, or refrigerators most often.

I'd keep calling around until I found a company that uses a quality leak detector.
 
Discussion starter · #13 ·
Coleman, luxair, York: aluminum condenser coil= 100% leaks

Yup, my Coleman York condenser coils leak. I found a tech willing to come to my house with a freon detector, and he put it near the coils and "beep beep beep beep". No upfront charge, nice guy. Now I gotta wait for him to call me back with a repair or replacement estimate... He thinks the coils are only under warranty for five years which would leave me out of luck... wish I would have found this guy a few years ago, as I believe that they leaked back then too.

Now I gotta figure out should I replace the whole system or just replace the coils and pay through the nose for R22?

Thanks for everyones help!!!
 
Now I gotta figure out should I replace the whole system or just replace the coils and pay through the nose for R22?
Thanks for everyones help!!!
If he has located the leak and can repair it he MUST pressure test the system before adding refrigerant. R-22 is being phased out and will only become more expensive.
I suggest you consider new equipment BUT only after having the house measured and have a Manual J load calculation performed to be certain the new equipment is the right size. Do not just get the same size.
 
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In a situation like this we've used "Easy Seal" by New Calgon chemical company with good success. Some don't like it, but it will seal a small leak!:grin2:
 
Discussion starter · #17 ·
Thanks again! Can I ask what is the deal with my line set? If I get a new system, and my line set checks out with a pressure test, can I reuse my old line set that ran R22 with a new R410A system?

The problem is that I live in the city and space is a premium and the line set is currently stuffed inside my walls who knows where. So a new line set would have to be run outside of my house in an ugly way.

I had one tech tell me that you can flush your line set but it doesn't fully work, and R22 residue found inside an r410a system can void your warranty. I had another tech tell me that I can re-use my line set. So which is it? Thanks!
 
Discussion starter · #20 ·
In a situation like this we've used "Easy Seal" by New Calgon chemical company with good success. Some don't like it, but it will seal a small leak!:grin2:


x2 It works great, and have not had a single issue with it.


What about this thread?

http://hvac-talk.com/vbb/showthread.php?853522-EASYSEAL!!

It seems like some people are not as happy as you two with the performance of the product?

I could be spending $1000 to put in the product and refill my R22,
and some people are saying I would be rolling the dice as to whether it (1) fixed my leak and (2) doesn't destroy my whole system.

Any other comments about this product? Thanks!
 
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