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Old 08-29-2014, 08:18 AM   #1
Sethmac
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Default Need Some A/C Advice Before I Call the Repairman

Need some A/C help. My downstairs unit is blowing but the temperature will not drop below 76 even if I set the thermostat lower. I compared the output temperature of the upstairs unit (that is working fine) to the downstairs and the upstairs unit (working) is blowing significantly colder air. Any idea on where to start looking for the problem with the downstairs unit? My filter was definitely in need of a changing so I may have brought this on myself.

thanks
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Old 08-29-2014, 08:23 AM   #2
cwill37
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Check your outside unit to see if the lines are frozen, and check the inside coil for the same thing. If there frozen then turn it off and let it defrost. Dirty filters can impede air flow on the coils and allow them to freeze.
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Old 08-29-2014, 08:31 AM   #3
TimH
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while you're at it, rinse of your outside condenser unit so airflow can get through like its supposed to. cut back any vegetation you have growing up around it, if any.

supply air coming out of your vents should be somewhere around 18-20 degrees colder than the inside temperature when it's running right.
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Old 08-29-2014, 08:44 AM   #4
ww1984
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I'm having the same issue. No freezing, clean filter and washed outside unit. Called the service company earlier
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Old 08-29-2014, 09:07 AM   #5
airehead
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Quote:
Originally Posted by ww1984 View Post
I'm having the same issue. No freezing, clean filter and washed outside unit. Called the service company earlier


It is most likely needing service
May be low charge could be a lot of different things

Ron
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Old 08-29-2014, 09:09 AM   #6
SB09
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Quote:
Originally Posted by airehead View Post
It is most likely needing service
May be low charge could be a lot of different things

Ron
Agreed. A bunch of different problems can cause this type thing. From cheap... To very expensive.
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Old 08-29-2014, 09:11 AM   #7
Sethmac
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Any HVAC TBHers in DFW?
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Old 08-29-2014, 09:25 AM   #8
dhillis
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Is fan on outside unit running? Is the big copper line from outside to inside getting cold?
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Old 08-29-2014, 10:10 AM   #9
ww1984
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Quote:
Originally Posted by SB09 View Post
Agreed. A bunch of different problems can cause this type thing. From cheap... To very expensive.
A/C repair man came to take a look. said my coils were dirty on the unit in the attic. He has to un-weld it and remove it to clean. $450. Guess that's not too bad. Sound right to yall?
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Old 08-29-2014, 10:45 AM   #10
Mike D
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Default Need Some A/C Advice Before I Call the Repairman

Quote:
Originally Posted by ww1984 View Post
A/C repair man came to take a look. said my coils were dirty on the unit in the attic. He has to un-weld it and remove it to clean. $450. Guess that's not too bad. Sound right to yall?

Say what? Unweld it?

I'm not an A/C repair man but my A/C guy has never unwelded anything to clean my coils.
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Old 08-29-2014, 11:30 AM   #11
elliscountyhog
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Quote:
Originally Posted by ww1984 View Post
A/C repair man came to take a look. said my coils were dirty on the unit in the attic. He has to un-weld it and remove it to clean. $450. Guess that's not too bad. Sound right to yall?
Good price and yes this is what we do if the coils are clogged. A brushing only gets what is on the edges. A coil is 3-4" thick and that does not include getting to the under side which can only be done by removing the coil.
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Old 08-29-2014, 11:54 AM   #12
ww1984
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Originally Posted by elliscountyhog View Post
Good price and yes this is what we do if the coils are clogged. A brushing only gets what is on the edges. A coil is 3-4" thick and that does not include getting to the under side which can only be done by removing the coil.
Thanks for the peace of mind. HVAC is far from my wheelhouse.
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Old 08-29-2014, 11:59 AM   #13
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1
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Old 08-29-2014, 12:17 PM   #14
John316
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Quote:
Originally Posted by Mike D View Post
Say what? Unweld it?

I'm not an A/C repair man but my A/C guy has never unwelded anything to clean my coils.
I think he means unsweat.
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Old 08-29-2014, 12:54 PM   #15
txoutdoorsman24
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Quote:
Originally Posted by Mike D View Post
Say what? Unweld it?

I'm not an A/C repair man but my A/C guy has never unwelded anything to clean my coils.
That's done when the coils are hard to access to thoroughly clean them good. It's pretty simple and could take a good tech less than 1.5 hrs to pull,clean and put back together. I've done it many times.
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Old 08-29-2014, 01:19 PM   #16
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Same thing happened to my unit during the first of summer. I cleaned the coils and replaced the filter with no change. I finally called the repair man he told me unit just needed a charge. There has been no problems since.
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Old 08-29-2014, 01:49 PM   #17
Sethmac
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Appreciate the help y'all...did everything I can do...hoping it just needs a charge.
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Old 08-29-2014, 02:54 PM   #18
Sethmac
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Sitting with the repairman and the verdict isn't good...have a leak in the outdoor unit right at the aluminum coil which apparently can't withstand a torch so it will require a whole new coil. He said that wasn't good news and is getting me a quote.

Sound right to you HVAC folks?
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Old 08-29-2014, 02:58 PM   #19
cosmiccowboy
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Quote:
Originally Posted by ww1984 View Post
A/C repair man came to take a look. said my coils were dirty on the unit in the attic. He has to un-weld it and remove it to clean. $450. Guess that's not too bad. Sound right to yall?
That's cheap to pull a coil and clean it.
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Old 08-29-2014, 03:00 PM   #20
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Quote:
Originally Posted by Sethmac View Post
Sitting with the repairman and the verdict isn't good...have a leak in the outdoor unit right at the aluminum coil which apparently can't withstand a torch so it will require a whole new coil. He said that wasn't good news and is getting me a quote.

Sound right to you HVAC folks?
If that is where the leak is he is right. It's not repairable.
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Old 08-29-2014, 03:08 PM   #21
Sethmac
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Yeah...he showed me it leaking...its a York unit. House built 2010...hoping its under warranty. Any ballpark prices I can compare his estimate too?
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