central air conditioner not cooling
I've been reading deja articles for hours on separate days - but I
would like some quick advice if possible. I'll try to keep the story short. Moved into a condo; very old Lennox upflow heating/2-ton air conditioning unit. 900 sq ft open space (no bedrooms/doors) The air that comes out of the registers is _somewhat_ cold - but not cold as I like it to be. As a result, I can only maintain the indoors temperature at about 78, no lower. I would like to get down to 70 if possible (outside temp 80-95). It appears that the previous owner did not have an air filter where the air got sucked in by the fan... so I put in a new filter. Due to the way the unit is positioned (basically inside a closet) - I'm not sure if having a filter is causing a problem by possibly restricting intake of air. There is no icing on the pipes at the outside condenser unit as I can see. The alum fins on the condenser unit looks ok, free of debris. I had a guy come out and fill it with a pound of R22, he said it was low. I did notice some improvement, I can go down to about 76 now, but still I would like to go down further to 70. Am I asking the unit too much? What else can I check to narrow down the issue. From reading some posts, how do I check evap coils (this coil is different than the condenser right?) & condensor/coil water drain (not sure where this is located)? I realize that the AC guy is supposed to be doing this stuff for me, but to make a long story short I do not get to choose who comes by to diagnose the unit. In the event I do have to shell out money, I would like to be informed. Thanks for any suggestions. |
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try evacuating for 1 hour and recharging the CORRECT manufacture's
recommended amount of virgin R-22 freon also, comb out all mashed-in places on condenser coil and evaporator coil with unit off, clean condenser with 1/2 Alki-Foam, and 1/2 water mix leave on 5 minutes, rinse with hose http://www.virginiakmp.com/Spec/AKF1.pdf wrote in message oups.com... I've been reading deja articles for hours on separate days - but I would like some quick advice if possible. I'll try to keep the story short. Moved into a condo; very old Lennox upflow heating/2-ton air conditioning unit. 900 sq ft open space (no bedrooms/doors) The air that comes out of the registers is _somewhat_ cold - but not cold as I like it to be. As a result, I can only maintain the indoors temperature at about 78, no lower. I would like to get down to 70 if possible (outside temp 80-95). It appears that the previous owner did not have an air filter where the air got sucked in by the fan... so I put in a new filter. Due to the way the unit is positioned (basically inside a closet) - I'm not sure if having a filter is causing a problem by possibly restricting intake of air. There is no icing on the pipes at the outside condenser unit as I can see. The alum fins on the condenser unit looks ok, free of debris. I had a guy come out and fill it with a pound of R22, he said it was low. I did notice some improvement, I can go down to about 76 now, but still I would like to go down further to 70. Am I asking the unit too much? What else can I check to narrow down the issue. From reading some posts, how do I check evap coils (this coil is different than the condenser right?) & condensor/coil water drain (not sure where this is located)? I realize that the AC guy is supposed to be doing this stuff for me, but to make a long story short I do not get to choose who comes by to diagnose the unit. In the event I do have to shell out money, I would like to be informed. Thanks for any suggestions. |
In alt.home.repair on Thu, 28 Jul 2005 03:02:58 -0400 "papaya"
posted: also, comb out all mashed-in places on condenser coil and evaporator coil I've tried that with what we call a butter knife, an all-metal knife with a slightly serrated blade that isn't sharp enough to cut meat. And also a small screwdriver iirc. And I bought a fin comb, and tried that too. One with several sides for different numbers of fins per inch. It still seems to take forever. Is their a trick? Should I use some sort of lubricant? What? thanks.. Meirman -- If emailing, please let me know whether or not you are posting the same letter. Change domain to erols.com, if necessary. |
If there has been no filter in your unit then for sure the evap coil is
dirty. That being said, it does not explain the lack of cooling on the lineset or the air coming out of registers. You need a competent tech to come and check the whole system over. Could very well be a leak on an old system on the other hand techs who just "throw in a pound of freon" because they don't know any better are not helping the situation. Also the advice to " vacuum the system down and weigh in the charge" is useless unless you can find out where the system is leaking. |
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