A buzzing appears when the scroll fan is running, but stops when the ac compressor comes on. It seems to have two cycles for this fan to operate, and on;y makes the buzzing sound during one of them.

Oscar Netto

• 110 Answers
• Posted on Sep 07, 2007

SOURCE: ptac fan keeps blowing

Try setting the fan control to "AUTO" this will cause it to cut out with the compressor.

SOURCE: Haier ESA 3185 AC won't cool; makes escalating loud vibrating noise near front panel/ filter

Have someone check the run capacitor of this unit. If the run capacitor is bad over shorted it can cause the unit to run and short cycle on a current overdraw. This makes for an electrical imbalance in the compressor motor. Next step is the compressor is faulty.

SOURCE: 2 problems.. AC Comp cuts out. And Fan will not stop.

Unit#2 -Sounds like the contacts on the master switch are welded closed or the switch is broken, Replacing the switch should fix this unit.
#1 is a little more difficult to diagnose. The compressor is being taken off line by a circuit that protects the compressor from damage either; 1- liquid refrigerant getting back to the compressor which can be caused by something as simple as a clogged return air filter or evaporator coil on a heat pump or 2- overload situation caused by a bad condenser motor or a clogged condenser coil. The first thing you need to do is clean both coils and replace the filter,. Then check to be sure your getting good airflow across both coils. I think it's most likely an airflow issue I hope this resolves the problem GL!

SOURCE: I have an Amana bottom

If the coils were really dirty, the compressor is probably just overheated. Let it cool down overnight then try again. If it still won't stay running it needs serviced. Could be the start relay or internal overload/overheat sensor in the compressor. If the coils were really dirty and it was used like this for a long time, the compressor could be damaged. It is almost never worth replacing a compressor in a home refrigerator.

SOURCE: Amana Prestige Ultra A/C compressor won't cycle on

When the compressor tries to come on is the fan motor running? If it is, then the compressor could possibly be bad or it can be just the capacitor that is bad. The compressor won't start if the capacitor is bad or doesn't have enough energy to help start the motor and it will also cause the lights to dim. If the comprssor was bad, in all likely hood the breaker would trip. You can do an ohms test on the compressor to determine that. If you have a meter that tests microferods, then you can test the capacitor as well. But if the fan motor doesn't come on as the compressor is trying to start, then check the contactor to see if it is not making good contact. I would check it just for arguments sake anyway. Also make sure that you are getting 220v to the unit as well. Good luck, hope this helps. Oh, you can also look at the capcitor and sometimes, they will puff up and look swollen when they go bad as well but not all the time.