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My air conditioning fan is very intermitant, the compressor seems to ru n for a short time and then stop, however the fan will not run. Sometimes it comes on and most of the time it doesn't.

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Check to see if the contactor that operates the fan and compressor is "pulling in" on a call for cooling. If the compressor runs and the fan doesn't it will fault on high pressure. They both have to run together to work. I think you have a bad fan motor or a bad fan capacitor though. The capacitor could be weak or shorted. Have that checked before you buy a fan. $5 compared to $75. My guess is the fan bearings are worn or dry. Try lubricating the fan. It should have oil ports on the side somewhere. Ten drops of oil in each port should do it if the bearings aren't shot. Good Luck.

Posted on Jun 29, 2009

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The evaporator fan keeps stopping. I can spin it and get it going, but it always goes off eventually. Do I need a new fan motor?


The fan only runs when the compressor runs. It stops when the defrost cycle runs. It can be hard to hear the compressor. If possible leave the refrigerator door open for a short time and set the temp cold. The fan should run and start unassisted. You can xheck for air flow from the compressor fan . The air will flow from the grill in the front, I would expect the internal freezer and external compressor fan to operate at the same time.

Dec 28, 2015 | Refrigerators

1 Answer

My 2003 VW Jetta air conditioning is cooling for a few minutes and sometimes longer and then it stops cooling. The fan continues to run but the compressor apparently stops running.


Have you watched the compressor in action? The compressor is driven by the fanbelt which turns a pulley on the compressor shaft, but there's an electric clutch that disengages the pulley from the friction plate attached to the compressor shaft. You should hear a click when the clutch engages and disengages. Do you hear that? Can you see the friction plate turning with the pulley or does it stay in one position while the pulley turns? If if works for a bit then stops turning, you may have a damaged friction plate such that it doesn't engage with the pulley. Take your car to an auto A/C specialist and let them examine it. It's also possible that the relay that sends 12 volts to the clutch is intermittent and needs to be replaced.

Jul 22, 2015 | Heating & Cooling

1 Answer

Compressor stop working


have a technician check the operation of the start/ run capacitor on the outside unit.

Apr 30, 2015 | Inverter Heating & Cooling

2 Answers

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.

Jun 22, 2011 | Goodman CKL36AR36 Air Conditioner

1 Answer

Running but no cool air blowing


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 that is called, "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 systems

Jun 15, 2011 | Weather King 10AJA3601AH Air Conditioner

1 Answer

Kenmore central air conditioning unit tripping breaker each time we turn it on.


The breaker tripping when you turn the unit on indicates a 'direct short' and 99 out of a 100 times the short will be either the outside fan motor or the compressor itself. Either way - you will need a qualified serviceperson to diagnose this problem correctly and make the needed repairs.
Best solution is to call AC person.
However, here's a good way you can get it down to either the fan motor or the compressor.
(1) With all power OFF - disconnect the wires to the fan motor
(2) turn on AC unit (a) if breaker trips it means the compressor is probably the shorted component. (b) if breaker DOES NOT trip and the compressor runs - it means the fan motor is shorted.
(3) If breaker tripped with the fan motor disconnected meaning the compressor is probably shorted you can then (with ALL POWER OFF) 'disconnect the wires going to the compressor' and re-connect the fan motor wires. Turn on power - and if fan motor runs (with compressor wires off) you know it's the compressor that is shorted.
After all this you will now know which of the two (compressor or fan motor) is shorted.
If it's the fan motor you can with 'limited mechanical experience' change the motor yourself, but if it's the compressor you will need to call a serviceperson because of the expertise needed to replace the compressor.

Jun 05, 2011 | Kenmore Heating & Cooling

2 Answers

My 1999 z71 pickup air conditioning is cooling for a few minutes and sometimes longer and then it stops cooling. The fan continues to run but the compressor apparently stops running.


Check the low pressure switch, sit on the accumulator, on passenger side, when a/c compr is not working, wiggle the connector to the low pressure switch, 9 out of ten time's thats the problem, I have seen this many time here at my repair shop. Replace harness connector, auto parts sell this, runs about $15.00 for this, but check first before you buy it.

Jul 04, 2010 | Cars & Trucks

1 Answer

Compressor appears to kick in, runs for short time


It sounds like your unit may have a bad run capacitor or start capacitor and relay. Low voltage will also cause this problem. First you need to make sure that you have the full rated voltages at the unit, if you do, then, have the run and start capacitors checked out and the start relay.

May 31, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

The air conditioning wont turn on. The fan turns on but when it tries to cool it just goes back to the fan.


Compressor won’t Start
The Main reasons that this will happen
1 - A bad run capacitor (silver or metal capacitor)
It’s either shorted, grounded or open.
If it’s shorted a lot of times it will bulge out, (sometimes slightly)
2 - A bad start kit ( plastic capacitor and Relay connected to it )
The capacitor is either shorted or open
The relay either has an open coil between terminals #1 and #5
Or the relay is stuck.
Any time you change the capacitor or relay you should change
the other, especially if they are over a year old.
3 - A loose, burnt or disconnected wire
4 - Wired wrong
5 Compressor is open (windings burnt open)
6 Low on charge not getting enough cooling back to compressor, (Feel top of compressor to see if it’s hot it shouldn‘t be)
7 Some compressors have a black plastic overload under the compressor cap which could be bad.

Aug 01, 2009 | Danby DPAC8399 Air Conditioner

1 Answer

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.

May 16, 2008 | Haier ESA3245 Thru-Wall/Window Air...

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