AC Not Cooling Like It Should...maintenance Guy Gives Up...help! - HVAC - Page 2 - DIY Chatroom Home Improvement Forum
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Old 08-09-2011, 05:22 PM   #16
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ok I used the thermometer to test the input and output vents for the inside unit. 77 going in (what hte thermostat currently says) and 60 coming out. The weird thing is that it's mid 70's outside right now, I'm keeping it on just to test it out. Shouldn't it be at LEAST as cool as outside since the air it cools comes from out there???

It's comfortable in here, but not cool like we want it. I'll be opening the windows for tonight, but with those numbers, it looks like the unit is fine, so why can't we get the apartment to cool?????

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Old 08-09-2011, 09:16 PM   #17
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another thing u mention in the description is that the maint guy recharged the system to make it work "properly",

if he overcharged the system, it can make the pressures inside the system work at higher pressures thus causing lower cooling capacity if it works with an "orifice" metering device

the compressor could also be overheating and shutting off intermittently (internal overload safety device) and when that happens the condenser motor keeps on running, giving the impression that the outside unit is "turning on" and running normally

u need an expert to check the unit out if u believe there is something truly wrong with the system
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Old 08-10-2011, 06:22 AM   #18
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The air the A/C cools comes from inside the building through the return air grills not outside. For the Pros I know it don't cool it removes heat , just sayin for the layman out there.
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Old 12-22-2015, 04:48 AM   #19
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If the air filter is clogged, air cannot flow properly through the air conditioner. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over. To remove debris from the air filter, try cleaning the filter. If it is not possible to clean the air filter, replace it.

The condenser coils dissipate the heat as the refrigerant passes through the coils. If the condenser coils are dirty, they won’t be able to dissipate the heat as effectively. As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. If the coils are significantly dirty, the air conditioner will not be able to maintain the proper temperature, and the compressor will run continuously in an attempt to cool the room. Check the condenser coils to determine if they are dirty. If the condenser coils are dirty, clean them.
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Old 12-23-2015, 07:38 PM   #20
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2011 thread..........................
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Old 12-23-2015, 09:20 PM   #21
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If you needed a refrigerant charge, problems returned and no other refrigerant side repairs were made, you could have a typical slow refrigerant leak. Like the previous post, time to bring in the licenced contractor. If possible, record the high and low pressures before he services the unit.

Please note residential systems are not intended to cool to 72 degrees and definately not 68. They may do so, but without specific consideration, not by design.
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Old 12-24-2015, 11:54 PM   #22
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Quote:
Originally Posted by Final Notice View Post
another thing u mention in the description is that the maint guy recharged the system to make it work "properly",

if he overcharged the system, it can make the pressures inside the system work at higher pressures thus causing lower cooling capacity if it works with an "orifice" metering device

the compressor could also be overheating and shutting off intermittently (internal overload safety device) and when that happens the condenser motor keeps on running, giving the impression that the outside unit is "turning on" and running normally

u need an expert to check the unit out if u believe there is something truly wrong with the system
Check superheat & subcooling - I an guessing overcharged?

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