Compressor will not stop running

Possibly a tstat issue. Run system until satisfied, once satisfied indoor fan shuts down compressor still runs remove tstat face plate and see if compressor shuts down. Another issue could be a sticking contactor for compressor. With a meter you could check at the contactor to see if you lose your 24volts for cooling but contactor remains pulled in.

So the compressor keeps running , fan shuts off and coil starts to freeze??

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With a non heat pump it is a simple 24 volt AC control circuit. In the attic there is a relay that is actuated via the fan control wire directly from the thermostat. On the thermostat there is an auto/man switch that controls the fan. Manual the fan runs all the time. Auto fan turns on and off with the outside compressor.

If the system is not calling for cool and the fan continues to run the fan relay is sticking. common problem. Sometimes after running for several days the relay will stop sticking if not, replace relay.

If the system is calling for cool and the compressor stops I would still expect the fan to run until thermostat tells the A/C to off. Some compressor units include a safety switch or high-pressure cut-out switch A blocked internal valve bad control board or external fan in outside unit defective no air flow in outside unit.
High pressure cut out not good,

Suggest turning temp max cool and observe. If acceptable cool and the compressor runs without interruption all is good, except for the blower in the attic. Safely check relay in attic blower circuit.

Hope this helps.

Is it a digital temp. display? Does this show a low temp? It should show +/-34 degrees. Listen if the compressor runs continuously. It should run for a while and then switch off. When you change the temp setting, as you turn it down, the compressor should stop. If it runs continuously then the likely cause is a stuck/faulty thermostat.Before replacing this, switch off and leave open until unit is at room temp. Then switch on again and monitor. If the thermostat if faulty and the compressor runs continuously you can damage it by overheating. The compressor will run for a good few hours after restart, until set temp. is reached and then switch off automatically. Good luck!

as long as the compressor is running on your freezer the longer the fan runs has to too cool the compressor . . .thermostat problem

CHECK THE CONDENSER COILS UNDER THE UNIT. THEY PROBABLY ARE DIRTY AND CANT REJECT THE HEAT.

First of all, remove filter at ceiling and with a flashlight or other source, when Compressor shuts off, look way up inside where evaporator coils are and see if you can see ice, or frost on coils/fins. It may be freezing up and fan will continue to run to aid in defrosting.

Depending on the time sequence you have this unit set to run, Fredrich's are designed so that the fan runs almost constantly, to keep the air moving. When it senses a rise in humidity above the level you have it set on, the compressor turns ON and runs until the level of humidity is lowered. This is especially true, if you are operating this unit in continual mode.

Hope this helps you and thanks for choosing FixYa.

Is the compressor running or is it just the fan? If its just the fan it is because it is cycling the air and it uses that air flow to check the humidity in the air. If the fan runs non-stop and the compressor does not turn on or the fan does not shut off there is a problem with this unit and you will need to replace it. Since it is brand new you should still be able to return it to the store.

was the compressor running? if the unit fails to make temp at a given setting and the compressor is running then turning down the cold control will not make it colder. the thermostat is a switch that turns the compressor and fans (if you have fans) on and off. the different settings only change at what temp the compressor etc. turns off. make sense? so listen for that compressor if it is running and the unit is war you have refrigeration system trouble: restriction, low charge, leak, etc...
cant tell you which without more info.