When I use the remote inside, the unit on the wall starts and blows out air. This air is not cold though. When I check the compressor outside, it is not operating and the fans are stationary. Is there something simple I can look at in the compressor such as a fuse?
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If there is no cooling (meaning no cold pipes and not blowing cold air) then check the outdoor A/C for any visible/obvious issues; breakers not tripped, no debris blocking the outside unit from passing air through it, etc. If all looks ok, you can start checking some things inside of the unit if you feel comfortable doing so.
Also, most indoor heaters have a higher speed/rpm for the fan when the cooling kicks on, and the heat runs on a lower speed/rpm.
There is a drainage and it is stucked with dust, mold etc. Just open metal lid on the wall inside your house, where the coil is installed and where you're changing filters, remove air filter, there at bottom you will see the drainage hole (now under water probably). Rent an air compressor from Home Depot or Lowe's, stick the hose to that hole and turn compressor on. This shall blow the drainage through. After that slowly pour 1-2 cups of Chlorox or Tylex in there, let it stand for 15 minutes, then pour some more water and blow with compressed air again, then flush it with water and blow last time. Do that at least once in two years, or you gonna have same problem again.
If it has a start capacitor the papper hole in the top of the start capacitor
will be broken if the capacitor was shorted I would have the run capacitor frist But if there is not a burnt wire then the compressor may be bad. You can try a hard start kit that pulgs on the two terminals of the run cap to see if the compressor will start but you will need a amp meter to tell if the compressor will continue to run
if it is blowing at all, this narrows the field to a compressor issue, if the compressor is coming on, but not blowing cold it could be that the coils are dirty and need to be cleaned. They can appear clean from the outdside and be dirty on the inside.
This unit is use in motels etc. Check the ouside coil ( conderser) from the inside (discharge fan ) for dirt. Most of these units are floor level . This can cause a unit to short cycle ( cold air is at the floor) .