Today the unit completely stopped cooling. A little bit of air is coming in from the vents in the ceiling, but it is lukewarm and weak. Looked at the outside unit and the fan isn't turning at all..It sounds like it wants to kick on, but the noise diffuses quickly and nothing every happens
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I would start by checking all vents. For it to work at first and then stop after a bit makes me believe there is a heating issue. This is normally caused by the unit not getting cooling air into it. Look over the entire unit and see if there are any venting areas and clean them.
If you find no vents, you have an internal issue that can only be repaired at a service center.
it sounds like your superheat needs to be calibrated or you have a small leak but it could be something as little as needing to clean your coils this will cause that and more when air cant get across them
remove cover at ceiling so you can see in at fins and see if they are frosting up bad. If they are, I suspect during AC installation, they didn't open up ducts on discharge properly and air flow is restricted, which will cause freeze up, especially if low flow from discharge ducts. I'm assuming it is a ducted system. You may have to remove or drop down entire ceiling assy, to see if the ducts into ceiling have any blockage. Sometimes they don't cut rubber roof material back far enough, or misaligned ducts and cause restricted flow to ceiling vents, which will cause unit to frost up, which kicks out compressor until frost is melted, then compressor kicks back in and cooling happens again.
It sure sounds like the out side condenser fan has gone out.If you need to Fix a water hose to run on it like a spray fanning out over the out side coils(condenser)and try and see if it will cool.It will do the trick,until you get it fixed on week days.If I can help,let me know.>>>firstname.lastname@example.org
I have some things for you to check. If you look at the outside unit the lines going into the house. Are they frozen? Have you had any yard work done, the reason I ask is they could have accidentally cut or pulled out the thermostat wires to the ac unit. Also, inside check for the same thing, frozen lines. Also, you may want to check the drain coming from the inside unit, it may be clogged.