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I turn the unit on, set it cool and I hear the motor running but feel zero air-pressure coming out from vents. I then set it to fan and I get nothing, not even the motor or fan sound...no sound or air at all. I then set it back to cool and now I don't even hear the motor on this setting either. If I turn it off for a few minutes and turn it back on I get the same exact results in the same sequence. I haven't run the system for more than 3 minutes at a time so I can't believe it has had anytime to overheat.
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Here's a pretty simple test - take off the cover if possible, remove the air filter - I know some it's trickier on some and they have a filter that slides in from the side versus a hinged cover, etc. you can pull off or down - but there are metal fins behind that filter. Turn the A/C unit on and try and feel those fins. If they are getting cold and your fan is on - it should be drawing hot air in right there, cooling it down and cool air should come out of the vent. If you turn the A/C on and feel those fins - hear the humming - but they are not getting cold - you have a bigger issue. Basically, your compressor isn't sending refrigerant through the coils and there's nothing to cool the air down with. *Could be other components - but that's a pretty basic test just to check functionality. If it's getting cold - but you're not blowing cold air - those fins could just be clogged with dust, etc. You have to be careful cleaning those as they bend easily. They sell special cleaner for them (you'll want to use it outside - usually an acid based cleaner) and a device that looks like a comb to get in between the fins to straighten if they get bent. Word to the wise - those fins being straight and clean allow the air flow to come through unrestricted - definitely less is more on the cleaning side; you'll want to be very careful. All The Best and Good Luck - Fins to check temp below -
THE OUTSIDE FAN MOTOR MIGHT NOT BE WORKING CAUSING THE COMPRESSOR TO GET HOT AND TRIP THE INTERNAL OVERLOAD IN THE COMPRESSOR - IF THE UNIT IS LOW IN FREON SAME RESULTS - WHEN UNIT IS FIRST TURNED ON DOES IT BLOW COLD AIR OR DOES THE AIR NOR FEEL COOL - JUST COOL AIR COULD BE LOW FREON - COLD THEN WARMS UP IS FAN PROBLEM
It probably has two fan motors. One that keeps the compressor cool and one in the freezer compartment that blows cold air out into the freezer and into the frig. You should be able to hear the motor running and feel the air coming out the vents when you open the door of the freezer. The fan runs all the time. If you do not feel or hear, the fan is not working. The one on the compressor, take the cover off the back and you can see if the fan is turning. It runs all the time also.
You suspect this unit as being a two stage because of the unusually high cut off pressure. It is a single stage and the motor really has a difficult task and is being pushed to the limits. to reach this pressure. We usually reset the pressure to lower setting ~~ say around 140. Your pump probably has a leaking intank check valve (brass fitting at tank) or leaking valve plate in pump. Simple tests : with pressure in tank unplug compressor from outlet and listens for air leak around pressure switch. As you unplug the running compressor from outlet you should hear air leaking from pressure switch for just a moment as air is let out of airline from pump to tank. If air leaks out till zero pressure then change the valve. If tank holds pressure then valve probably ok. Next test, with no air in tank and air filter removed, plug in compressor and feel intake port for strong suction. If the valve plate is bad, suction will decrease as pressure neers the 120 mark till the point of feeling that air is actually blowing out of intake. With good valve plate there will be strong suction untill unit reaches set pressure. If valve plate is bad also change the cylinder and piston ring. Good luck with your repair.
Welcome to FixYa,
Check the Following Is your filter clean? Look and the evaporator in the inside unit. Is it frosted up? Do you have condensation water in the pan? Go to the outside unit and feel the air coming out of the fan. Is it warm? Now feel the 2 copper pipes coming out of the unit. Is the small one warm or hot? Is the larger one cool ? Is there moisture on it? Air conditioner runs but doesn't cool at all If the airflow is good and the air coming out is not cold, your home air conditioning problem may be a temporary problem - your coils may have frozen. Turn the unit off for an hour to let them thaw, then try again. If cold air is now present, freezing coils were the problem; if the problem recurs soon after turning on, you may need to replace the coils. Again, call a pro. If you have ceiling vents in upstairs rooms and the air flowing from them is consistently warm, you probably have leaky or poorly insulated ductwork in your attic. See my Attic ceiling insulation page for more information on insulating ductwork that runs through attics. Another likely home air conditioning problem if you have good airflow but no cooling is that thebreaker to the outside unit is shut off, which, depending on the installation, can either cause the air conditioning system to not run at all, or to appear to be running but not provide any cooling. If you can hear the compressor fan running outside, the breaker is on, but if the outside unit is silent the outside breaker may be off. If switching it on does not solve the problem, look for the high pressure cut outon the condenser and try resetting that. Check this Link for Detailed RepairClick here
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Welcome to FixYa
Check the Following
Is your filter clean? Look and the evaporator in the inside unit. Is it frosted up? Do you have condensation water in the pan? Go to the outside unit and feel the air coming out of the fan. Is it warm? Now feel the 2 copper pipes coming out of the unit. Is the small one warm or hot? Is the larger one cool ? Is there moisture on it? Air conditioner runs but
doesn't cool at all If the airflow is good and the air coming out is not cold, your
home air conditioning problem may be a temporary problem - your coils
may have frozen. Turn the unit off for an hour to let them thaw, then
try again. If cold air is now present, freezing coils were the problem; if the
problem recurs soon after turning on, you may need to replace the coils. Again,
call a pro. If you have ceiling vents in upstairs rooms and the air flowing
from them is consistently warm, you probably have leaky or poorly insulated
ductwork in your attic. See my Attic ceiling insulation page for more
information on insulating ductwork that runs through attics. Another likely home air conditioning problem if you have good
airflow but no cooling is that the breaker to the outside unit is shut
off, which, depending on the installation, can either cause the air
conditioning system to not run at all, or to appear to be running but not
provide any cooling. If you can hear the compressor fan running outside, the
breaker is on, but if the outside unit is silent the outside breaker may be
off. If switching it on does not solve the problem, look for the high pressure cut out on the
condenser and try resetting that.
your fan motor is located on firewall behind engine towards middle of car under a cover gain acess turn fan on inside car lightly tap back of motor if fan starts running you have a bad fan motor i assume you have already checked your fuses
This is a Sub Zero and many technicians do not realize that these units most all run on 2 separate systems. 2 cold controls 2 compressors 2 evaporators. They share a condenser and condenser fan motor. What you are describing is most likely a bad cold control. It is pretty common for these to get some age and go bad. If you are very savvy with repairs yourself then if you access the compressor area and feel that the compressor on the right is cool and the compressor on the left is warm then you know that the ref. compressor has not been running. UNPLUG THE UNIT OR CUT THE BREAKER OFF. Remove the shelving from the fresh food section and the cover to the lights and the panel below the lights and lean the back panel forward to access the cold control. You will see 3 wires to the cold control. The green wire is the ground wire of corse. Unplug the other 2 wires remembering their location on the control unit. Take a jumper wire and jump these 2 wires. If when you power the unit up the right side compressor comes on then you know that your fresh food cold control is bad. Replace fresh food cold control.
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