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A/c not blowing cold...

I would like to know if its 98 outside and 78 inside is my ac working properly or not? What is the normal indoor/outdoor difference my ac should be when it is cooling properly. It was 86 inside so I found a ac guy to come out he put his gages on it and said coil needs cleaning I said I will do that right now after you leave. I did. He hooked his guages and freon tank up. 10mins later as I watched. He said it was down about 3 lbs. He then went to his car and brought me a receipt back showing the 3 lbs and all. We shook hands and he left. I feel its still not cooling right. Was he wrong or what? Let me hear your opinion on this.
I am in the midwest its 100 degrees in the summer here alot. All this week. I cleaned my filter and the coil very well. I feel all my ac needs is CARE and the proper and right care. NEGLECT on my part is the word here as I have not had the freon checked in a few years. I clean the coil religiously though. When I feel the vent in the house it feels cool, lukewarm halfa$$ed cool if you know what I mean. I always guage a good ac guy buy the proof of the pudding after he leaves or does his work. This guy did not even ask me to know go inside and see if its cooler. The return pipe is cold and sweaty I saw it. Everything else with the 10 seer Rheem 3-2-2 1700 sq ft house ac seems to be ok. The ac drain line drips water nearby so its not clogged. I have a programmable thermostat. I set it on 71 always. And it usually does what I command. When it doesnt this is when I suspect a problem. Let me hear your thoughts on whats wrong? Oh and the guy did say the head pressure was not too bad or too high. He said he put in 3 lbs and what a deal I was getting.

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Basically for him even saying what he said, was not the right guy. Most house units with the Square footage you provided have 2-3 lbs of refrigerant yes , If he said you needed three pounds he is lying becuase you ac compressor would have burned out a long time ago and it would also short cycle too.Meaning outside unit would go on then off rapidly. In most systems a compressor has a safety where if your dangerously low it will cut off but before that you ll notice your ac blowing hot air.So that was not cool him telling you that . I'm not there to check but a real tec. would check inside and outside keep the gauges on and let you know . "even after if he did "(put 3LBS)" he should of waited about 15-20 Min's to see if it were blowing cooler.my suggestion is in the attic" You might have some infiltration of humid air coming in . Which means cut or holes in the ducts.I Hope that helped any more questions fill free to ask .
P.S. Get a real tec Who would explain better no mom and pop joints"

Kevin a Sheet Metal worker In Commercial Heating and Air Conditioning.

Posted on Jul 03, 2009

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If it was 3# low then there is a leak that needs repaired or it will go low again. A 20 deg difference is pretty good and a lot depends on hoe well the house is insulated, the sun is prevented from shining in windows and how often the building is entered or exited. The return should not sweat.
Eric

Posted on Jul 03, 2009

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