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WHEN I TURN ON UNIT CONDENSER FAN MOTOR STOPS AFTER 5 MIN AND THE COMPRESSOR START MAKING ALOUD NOSE

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The fan motor has bad motor bearings. After the motor has fun for a short amount of time, the bearings are getting so hot that they are physically swelling up and locking up the motor. This is due to poor/no motor lubrication. Some motors required lubrication with oil while some do not.

Replace the fan motor and run capacitor. After that, everything should return to normal.

Posted on Aug 01, 2010

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Rangemaster sxs cream . Why is my fridge and freezer the same temp ???? If anybody could give me an answer or solution.


Jason,
MOST refrigerators get there cold from the freezer side and circulate it via a fan that's also normally inside the freezer. There are three motors normally in a refrigeration system. The inside Evaporator fan motor that circulates air across the evaporator coil inside the box, the Condenser fan motor near the compressor that cools the freon after compression, and the compressor itself. If you open the doors (and sometimes you may have to hold in the door switches) do you hear a fan running? If not you could have a couple things going on: 1. The fan(s) has failed. 2. The freezer Evap coil may of iced over and the fan too is frozen stopped. 3. Your condensing unit:(compressor, condenser fan, condenser coils) has a problem.
It is important to know if the compressor itself is running. If there is a loose connection to the compressor via the start/over load relay (normally attaches directly onto the compressor), or if the start/over load otself is bad the compressor will not run. Best way to tell is via gauges but I doubt your frig has ports. Check to see if your compressor is really hot. Could be bad start/over load relay or bad compressor. Try unplugging your frig for say 30 min then, with your hand on top of a cool compressor, plug the frig back in and see if compressor smoothly vibrates for at least 5 min without becoming very hot or shutting off even though fan continues to run. The fact your fan is running TYPICALLY means the thermostat is calling for lower temps and the fan/compressor kick in together.

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My ac central air is blowing air but not cold


Problem #1:Outdoor condensing fan motor has stopped running. This problem could be caused by a bad motor run capacitor. If your motor capacitor is not the problem, then more than likely you need a new motor. Is the fan blade tight, stiff or hard to turn? If the fan blade is hard to turn then you probably need a new motor. Problem #2: Air conditioner compressor will not start. When power is applied to the air conditioning outdoor unit the fan starts, but you hear a sound like the compressor is trying to start, "UGGG"..., for about 5 to 10 seconds and then all you hear is the outdoor condenser fan run. The compressor is locked and will not start. What is happening is the compressor is trying to start, but because the compressor motor is locked it tries to start for a few seconds and then because of the high amperage being drawn goes off on internal overload. The internal overload protects the compressor windings from overheating and burning up. I see this many times during the start of the air conditioning season. Some compressors just have a hard time starting after sitting all winter long. Some compressors are locked up so bad that I can not start them and must tell my customer that they need a new compressor . Many times I can get the compressor started again without having to buy a new compressor or new air conditioning system by using the device known as a "Super-Boost." I keep two or three of these on the truck. They have saved many of my customers from having to buy new air conditioning compressor. Another good device is called a "5-2-1" kit.

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1 Answer

Unit runs for about 5 min the cuts off. whats the problem?


Hi!!
It could be many things, the most common are Low R22 refrigerant, bad fan motor, bad compressor. obstructed condenser coil, bad starting relay, bad capacitor. among other things.
To check fan motor, set unit to HI Fan Only setting and let it run for a while, check that fan did not loose speed and it is not getting too hot.
If fan is OK, then turn unit to HI Cool 60-65 degrees and see what happens. Hear if compressor kicked in or if just made a humming noise and stopped. if this happens, replace capacitor.
Keep me posted!! Rate this post!!

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It blows cold air for 5 min. and the it blows cool air for 15 min. the room warms up . Why does it stops blowing cold air continuasly???? The thermostat was disconectet on purpose so it coul clow cold air...


See if you can reposition the thermister on the facing of the evaporator coils. That could be it or the thermister might be bad. They don't use copper/mercury sensing bulbs these days. They use these cheap thermisters.

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Try moving it out so that you can get to the back of it. You have power as the lights work. Here are a couple of things to check. There is a fan motor with a blade on the shaft. Turn the temp. control down so unit will cycle on. See if this condenser fan motor is running. If not, it has burn out. If it is running, check to see if you can hear the compressor pot running, You will be able to hear it come on when you turn the control down to colder.Please don't turn the control up and down, as this will cause the compressor to short cycle and lock out on overload. Wait about 5 Min. between moving control knob. If compressor doesn't run, it could be the start relay, or you have lost the compressor. There are many things that can go wrong, but these are just a couple you can check out yourself. Condenser fan motor you can replace yourself. I hope this gives you a place to start.

Good Luck, Sincerely, shastakaker7

ps Always unplug unit before replacing any parts.

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be aware that not repairing this asap that you are causing yourself more problems First I would change out the fan capacitor and see if this could be the problem. Secondly if the capacitor isn,t the problem change out the motor . By continuing to allow the system to cycle like this the compressor will take a dive on you costing more . Good Luck

Dave

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Your unit is probably operating in defrost mode. When you use a dehumidifier in a cold room, the condensing coils can freeze water. The unit senses this and thus stops the compressor until the water frozen on the coils melts. Then it resumes its cycle. This is a problem you will have during the winter months. It makes the operation of the unit inefficient, but this is otherwise normal behavior.

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From your description it sounds like your compressor has gone bad. Check the condenser and see if it is plugged with dust. Clean it and let the unit cool off for about an hour or so. A plugged condenser can cause the compressor to overheat which can cause the thermal overload to click cutting the power to the compressor. After the compressor has been aloud to cool off restart the system and see if the compressor will operate. If you had to remove a panel in the back to access the condenser make sure you replace it for proper air circulation.

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