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Comfort aire model wpc 12 -1 intake/outtake pump is noisy

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SOURCE: weatherking heat pump sounds noisy

Without hearing the "noise" it is difficult to diagnose via internet; however, I can tell you that the 20 degF temperature difference is a good sign.

If the noise is at the outdoor unit, try to determine if it is the casing or something else. Sometimes the casing can rattle and/or vibrate that can cause a sound. Sounds can also come from refrigerant lines rubbing against the casing. Other noise sources at the outdoor unit are the fan motor, fan blade assembly, and compressor. You can remove one of the fan motor wires from the contactor, tape off the end, and start up the unit for a few seconds to see if the noise is still present. Then you can replace the wire and remove the compressor wires from the contactor and repeat the test. This will help you determine where the sound is coming from.
If the sound is coming from your indoor unitl, the most common sources are loose tape, Blower wheel, blower motor, or blower housing. Also look for loose panels.

Without being onsite with toolbox in hand and being able to actually hear the sound, I hope you find this information to be helpful to you moving forward. :-)

Posted on Jun 07, 2010

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You'll read a lot about making sure that the filter is clean and that the medicine cup is cleaned and that hard water can effect the operation of the nebulizer. However, the problem is most likely in the pump. Even though the pump is running, it is not pushing enough air into the medicine cup. You may even feel air coming out of the tube. When unrestricted, the air will come out, but, once restricted by the medicine cup, the air may not be fast enough to nebulize the liquid. If you want to confirm this, take the tube and hold it to the end of a bike pump, if, while pumpung, you successfully see mist, then you know for sure.

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You'll read a lot about making sure that the filter is clean and that the medicine cup is cleaned and that hard water can effect the operation of the nebulizer. However, the problem is most likely in the pump. Even though the pump is running, it is not pushing enough air into the medicine cup. You may even feel air coming out of the tube. When unrestricted, the air will come out, but, once restricted by the medicine cup, the air may not be fast enough to nebulize the liquid. If you want to confirm this, take the tube and hold it to the end of a bike pump, if, while pumpung, you successfully see mist, then you know for sure.

Fixing the pump is not too difficult. Over time, the chamber where the air is compressed becomes dry and, just like a dry bike pump, the air escapes from the chamber due to poor seals. The pump is pretty simple. Make sure it is unplugged from power and remove the screws holding the housing together. Inside you will see the motor, a fan, a power switch and the intake and outtake tubes. Follow the outtake tube to the pump. The junction where the tubes meet the pump is the location of the air chamber. You may need to remove the screws that secure the tubes to the chamber. Once apart, take some grease and lightly coat all of the interior surfaces of the chamber. When finished, reassemble and you're good to go!

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