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Loud cracking noise from ductless heat pump

Noise is coming from interior unit

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

pierre1811
  • 144 Answers

SOURCE: Heat pump is humming loud>

When the heat is not on. Go to the T-stat and turn the fan to the on position. With the blower now running is it making the noise? If so you probably either have something in there such as the filter that was mentioned, a piece of paper etc. or one or more of the blades on the blower wheel is vibrating. Don't let the condition persist w/o having it checked out or you may turn a simple fix into a costly one.

Posted on Jan 22, 2009

mrgrzz
  • 88 Answers

SOURCE: New 14 seer split ruud heat pump makes very loud knocking noise

Well you may want to have a tech come out and check the freon level, but mostly when going into defrost, some units make alot of noise, the freon is reversed in the unit by way of the reversing valve, it makes a whooshing sound like freon is draining off, as far as the knocking noise, could be as I said in the beginning, might be low on freon, but it could be that, this particular unit does this, I have had units make some really strange noises in the past but functioned perfectly, hope this helped, please let us know, thanks again,
mr.grzz

Posted on Jan 24, 2009

  • 3 Answers

SOURCE: fujitsu heat pump noise

i would check the blades on the condenser fan motor and make sure they are not hitting anything if they are not, spin the fan see if the fan spin freely, it should, if it doesn't it could be the bearing in the motor are dry and going bad

Posted on Jan 24, 2009

jumptrout51
  • 3361 Answers

SOURCE: Loud noise

It is probably a rotary compressor unit.
They tend to make a start up noise.
Some technicians advocate adding a booster starting device to help the compressor start more quickly, thereby reducing startup noise.

Posted on Mar 12, 2009

  • 2 Answers

SOURCE: LG Ductless Mini Split System LAN125hv: Heat pump doesn't run.

CA: Compressor Discharge Sensor Fault

Contact a qualified service technician and have them replace this sensor.

Posted on May 04, 2010

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1 Answer

No power at interior unit. power everywhere else


If this is a mini split ductless there is a control wire with 3-4 wires inside (normally red, white, blue and green) that is connected from the outdoor unit to the indoor unit. This wire feeds voltage from the o.d. unit to the I.d. unit. If all connections at the o.d. unit are good, then check for voltage at these connections at the o.d. unit. If no power at these connections then a circuit board has faulted. Call a tech. and have a tech support number ready (1-800#) in case your service tech don't have it.

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Ticking Noise in my Fujitsu Mini Split Indoor Unit


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It shouldn't be too loud. You don't explain where the noise is coming from? The air handler/furnace or the outdoor unit.

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If the fan is attached to the water pump tahe hold of a blade and try back and forward towards the motor. If there is movement there it will be either a fan hub failing or a water pump bearing. Second check remove the fan belt and check for noise.( idle engine for short period of time) If it is gone confirm pump by spinning any adjuster pulleys and check for noise or rough movement

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1 Answer

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Taking a little bit of time for heat is normal but the "pressure" thing you are referring to leads me to believe that the reversing valve is getting stuck. You will here that "pressure release" noise with a reversing valve but it should not be happening 5 minutes after start up.

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I have a Mitsubishi heat pump that runs well but the outdoor unit does not defrost what could be the problem.


Why does my heat pump ice up in Winter?
Heat pumps naturally ice-up in the winter. It is normal for the entire coil to be covered in a white frost and even light ice, during cold weather conditions. However, it is bad for the entire unit to be encased in ice. This indicates ductless heat pump problems which should be addressed quickly to save energy and avoid serious damage to your ductless unit. These systems should periodically go into a defrost cycle. This keeps the unit running efficiently. If the coils are blocked by ice, proper heat transfer between the coil and the outside air will not occur.
How does the defrost mode work?
When the mini split heat pump goes into defrost, the reversing valve inside of the outdoor unit is energized, switching the system from heat to the air conditioning mode. The outdoor coil becomes the hot, the indoor coil becomes cold, and both - the outdoor and indoor fans shut off. This allows the outdoor coil to melt accumulated ice. When the built-in micro-computer analyzes that all ice have been melted, the heat pump heating system goes back to heating mode.
sanyo-mini-split-defrost.pngA cloud of water vapor may be seen rising over the outdoor unit and a "whoosh" sound can be heard as the refrigerant reverses direction. The entire process usually takes up to 10 minutes (depending on conditions).
How often does the system goes into defrost mode?
Ductless mini-split heat pumps have different ways of determining when to go into defrost. The built-in microcomputer determines outdoor temperature, refrigerant pressures, and several other factors. In colder temperatures the system will go into defrost more often than in warmer.
If a ductless mini split heat pump is severely iced-up in the winter it is possible that it isn't defrosting (though there could be many other causes). Let the manufacturer certified technician check your system

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1 Answer

''EMI'' heat w/ac acts weird.


Hi, what you have here is a ductless heat-pump split system. In the heat mode the compressor will run on a heat pump as it uses a reversing valve to reverse the flow of freon to heat your house. If it gets cold enough, the stat will call for the emergency heat strips to energize to come on for back up. Now, if the unit does not come on or go off when the thermostat calls for either heat or cool to come on and it just does it whenever it wants to, the stat will have to be replaced with a new one. If you plan on doing this your self, I would get the exact same heat-pump stat as you have because they make so many different models that the wiring may be much different and you will be lost when you go to wire it up. The heat - pump has many more control wires on them then the conventional heat/ac unit. So make it easy on your self and get the same one. They are easy to replace. If it is ignoring the settings its the stat. Heat strips and compressor running in the heat position together are normal for a heat- pump.
Sincerely,
Shastalaker7

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1 Answer

Ductless minisplit in old mobile home


ductless mini split units are a very good choice!  they are obviously quieter, more efficient and easier to maintain than window units. the downside is the initial expense of buying the unit, but this is paid back in eletric savings and peace of mind. Good luck Peyton

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