not sure I have a problem

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  #1  
Old 08-18-15, 04:08 AM
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not sure I have a problem

Doing some cleaning on my a/c evaporator coil. I noticed that my coil appeared to only be wet about half way up. So I proceeded to check my superheat and subcool measurements. My subcool is about 10 degrees and my superheat about 3.5 degrees. I believe both should bee about ten degrees. The unit cools well with a difference of about 15 degrees between the intake and the output air. However the humiidty seems high in the house around 40%. I have a 2010 goodman 2.5 ton heatpump 15 seer. It uses 410a freon. Is there possibly a problem.
 

Last edited by ferdly; 08-18-15 at 05:52 AM.
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Old 08-18-15, 07:01 AM
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40% RH is fine, but coil half way wet may be a problem, what type of metering device you have ? Is the large pipe ice cold ? (if you want me to guess----may be refrigerant a little low----, since you can check subcool or super heat, you should be able to check that out yourself, 15 degrees split is not great, but acceptable)
 
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Old 08-18-15, 07:03 AM
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The only thing that caught my eye is the SH and Delta T. Where did you take temp reading, inside or out?
 
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Old 08-18-15, 08:45 PM
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Outside, approximately 6 inches from service valve.
 
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Old 08-19-15, 06:40 AM
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Take temp reading inside at the evap coil. See if you get a diff reading. TXV or piston?
 

Last edited by skaggsje; 08-19-15 at 06:41 AM. Reason: added
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Old 08-19-15, 07:14 AM
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TXV. You taliking about where the line goes out and into the coil correct.
 
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Old 08-19-15, 12:10 PM
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Yes, on the suction line at the evap coil.
 
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Old 08-19-15, 07:22 PM
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temp on suction line 54 at the evaporator. temp of liquid line before txv is 87
 
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Old 08-21-15, 02:25 PM
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This is a forum for homeowner type repairs, not for refrigeration technicians.
In most areas you need to be certified/qualified to work on refrigeration sealed systems and is not an area these forums will help with.

It's expected that members who answer questions here will respect our rules.

See sticky at the top of this forum topic.
 
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