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Outdoor fan does not come on

I have a trane heat pump installed in 2004, the outdoor condensing unit fan does not come on. If I give the fan blades a nudge it will start. Is it possible the capacitor is bad or does it have to do with the defrost cycle? Thanks!

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I have Trane XE 800 Heat Pump I had tech to replace a capacitor and blower motor in the outside unit. The house is cool but the compressor seems to come on a lot even the blower is not on. I have the therm set on 75 degrees. The compressor makes a whinning noise. It is as thought the fan and compressor is on two different cycles.

Posted on Jun 26, 2010

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Most likely it the the cap that is bad. Is this in heating or cooling mode?

Posted on Jun 04, 2010

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Brand New 2 weeks old 4 ton Trane compressor leaks a lot of water onto pad


If the unit is running in cold weather than there is ice building up on the coils located outside. This is normal in that the unit is running in heat pump mode heating inside and cooling outside, After the unit detects the ice build up it briefly reverses the cycle heating the outside coils melting(defrosting) the ice which you observe as water on the pad.

The video gives you an example of the defrost cycle!
2012 Trane XL15i Heat Pump Defrost Cycle Steam Show

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AOU12RLS outside unit is knocking or ticking? Any idea what it might be? Nothing appears to be in fan after taking cover off to examine.


need to check and make sure the condensing fan ( outdoor unit fan) wires are not hitting the fan blade, it could also be that the fan blade needs to be balanced.

Oct 21, 2013 | Fujitsu "AOU12RLS 12,000 BTU Cool/16,000...

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I am trying to get some information on Intertherm unit on the inside of a Manufactured Home, With the new Hud requirements they are saying the out door unit must be installed by the manufactures...


Hi, since you live in a Manufactured home and not a R.V., I see no reason why you cannot go with what ever type of condensing unit you want to install on a slab outdoors. The installation instructions for the Intertherm unit for installing the outdoor unit should apply to any brand unit you want to use as long as the size of the indoor coil is the same capacity of the outdoor unit. For example, if the indoor unit is a 2 ton, 2.5 ton, 3 ton and so on, the outdoor unit would have to be the same is all. Same freon type, most are R-22, but they are using the new R-410a freon, so make sure of the freon type of the indoor coil is and get a unit of the same size and freon type. The installation instructions for the Intertherm should almost be the exact way to install any other condenser. Look for things like the distance from the outside wall, if it needs to be anchored, how far away the electrical disconnect box has to be from the unit, example 4' to 6'. Things like this you need to look for in the installation instructions is all. The new condenser unit holds enough freon for up to 25' of copper line set also. Try to stay with in that range to the indoor unit. If not, no big deal, they may need to add or remove a little freon is all. I hope this has been helpful to you on this. Trane, Carrier, Rheem, Ruud, Bryant, are all top of the line, better made then Tntertherm in my opinion. They should all be hud approved, I don't know where you are from, but here in Ca, they are.
I wish you the best, and please don't forget to rate me. I know you will be kind.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor.

Aug 06, 2010 | Intertherm Heating & Cooling

2 Answers

When the unit is in heat mode is the fan on the outside supose to run? Capacitor on outside and inside have been replace fan was running when capacitor was first replaced.


Hi, and the outdoor condenser fan should not be on at all in the heat mode unless this is a heat-pump!! So, I can see that this is a 3-ton Carrier split system and I haven't pulled up any information on it, only if I need to. But if the indoor unit runs on natural gas/propane, this would not be a heat-pump and the outdoor fan would run only in the cooling cycle. So, if it is not gas fired it is a heat-pump, and yes the outdoor unit should be up and running all year around. On a heat-pump you will have what is called a reversing valve in the refrigerant system that directs the flow of freon in the right direction for the season you are in. Most all heat-pumps will have a heat strip package installed in unit for emergency and aux. heat if compressor lets say fails. You're thermostat will have on it a selector switch, you will see on it these labels, Aux., emergency heat, auto/on/off/heat/cool. You will know from what I have just went through with you what you have. Forgive me for such a long explanation as I like my customers to understand more about there units in question. I could have just said yes or no and thanks? Doesn't work like that for me. I hope this has helped you out. One thing, If you determine this is a heat-pump and the fan is not on when in heat, you may have lost this condenser fan motor? You say both run caps. were replaced, and normally when you loose a run cap for a motor they will open internally, leak, buldge ect. So if this is taking place, if you can yourself take a look at the run cap. Also, make sure you have 220 volts to condensing unit. If not, check breaker probably a 30 amp double pole to see if it has tripped. You will have a disconnect box at the unit and inside there will also be 2 fuses. If you see only a pull out square connect, the fuses are still there but in behind the cover. If you have power and can hear the compressor come on but fan does not, I am positive you will have A faulty run cap, or faulty motor. Kill power to unit and try and slide a metal coat hanger down to prop or blade to see if it spins freely. If it is hard to turn bearings are froze up. If the capacitor seems to look ok, and the motor does spin free, It still may have open windings. Do these checks I have asked of you on power to the outdoor unit. If all is good, Stand in front of the unit and have someone turn the stat on for what season you are in. Lower or raise temp a ways above or below room temp. You should her the contactor close and compressor will start along with the condenser motor.If compressor starts and motor does not, then I would say it has failed and or cap again. When a motor is replaced, the run cap must always be replaced to!! Please get back to me and keep me posted. I will wait to hear what has happened. Good Luck.
Sincerely,
Shastalaker7

Jan 13, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

I have a 20 year old Trane heat pump. Outside


Yes, you will want to put the unit into cooling mode to help assistance with the ice melt.

If you can, block off the outdoor coil or disconnect the outdoor fan motor. This will assist in raising the discharge pressure and temperature and thus, it will melt the ice quicker.


Or, if you have the capability, you can take a garden hose around to the unit hooked into hot water and melt the ice that way.




If your control board is messed up, why aren't you replacing it?

Jan 10, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

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Thermostat wiring


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Please note. Not all installers use the proper color codes when they install or replace equipment. It may be necessary go go to the furnace or outdoor unit to verify what wires are for what purpose. Also be sure there are no splices in the wire that could change the wire colors between components.
  • R (red) or Rh (Red heat) 24 volts from equipment.
  • Rc (Red cooling) 24 volts from transformer in cooling equipment.
Note: If only furnace has a transformer and cooling equipment does not jumper Rc and Rh.
  • W (White) sends 24 volts to furnace control to start the heating cycle.
  • W2 (no standardized wire color, usually whatever wire color is available) controls second stage heat.
Note: W2 is most often used for heat pumps to control what is called emegency heat or Auxillary heat, and most often will use the white wire.
  • Y (yellow) often (blue) is used, controls cooling unit (outdoor condensing unit) also is used for heat pump heat.
  • Y2 (no standardized wire color, usually whatever wire color is available) controls second stage cooling.
  • G (Green) controls the fan "on" operation of the furnace/air handler. Also often is used to start the blower for many electric furnaces.
  • C (common) most often brown but can also be black or other color available to installer.
  • O (orange) Energizes heat pump reversing valve for cooling (Trane and most other brands).
  • B (Blue) Energizes heat pump reversing valve for heating (Rheem, Ruud and Weatherking).

Jun 02, 2009 | Carrier Heating & Cooling

1 Answer

Need low voltage wiring diagram for condenser


look on the indoor unit and see what they do you hav common from trans former yellow for compressor white for elect heat then reversing valve usually orange green for fan on the out door unit board you can tell what is common and what is for heat

May 08, 2009 | Heating & Cooling

1 Answer

I need help with my central heat and air unit, it has a heat pump. the model number is GQ3RA-036K. I am changing the theromstat out and the wires are connected to it. there are eight wire colors that are...


Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Thermostat wire color codes explained.
Please note. Not all installers use the proper color codes when they install or replace equipment. It may be necessary go go to the furnace or outdoor unit to verify what wires are for what purpose. Also be sure there are no splices in the wire that could change the wire colors between components.
  • R (red) or Rh (Red heat) 24 volts from equipment.
  • Rc (Red cooling) 24 volts from transformer in cooling equipment.
Note: If only furnace has a transformer and cooling equipment does not jumper Rc and Rh.
  • W (White) sends 24 volts to furnace control to start the heating cycle.
  • W2 (no standardized wire color, usually whatever wire color is available) controls second stage heat.
Note: W2 is most often used for heat pumps to control what is called emegency heat or Auxillary heat, and most often will use the white wire.
  • Y (yellow) often (blue) is used, controls cooling unit (outdoor condensing unit) also is used for heat pump heat.
  • Y2 (no standardized wire color, usually whatever wire color is available) controls second stage cooling.
  • G (Green) controls the fan "on" operation of the furnace/air handler. Also often is used to start the blower for many electric furnaces.
  • C (common) most often brown but can also be black or other color available to installer.
  • O (orange) Energizes heat pump reversing valve for cooling (Trane and most other brands).
  • B (Blue) Energizes heat pump reversing valve for heating (Rheem, Ruud and Weatherking).

May 07, 2009 | Heating & Cooling

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either bad condenser fan motor or fan capacitor

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Trane Heat Pump


What caused the power outage? Check the outdoor disconnect to the condenser unit. The fuses may have blown, causing the heat pump to not function and depending on the aux. heat to carry the load.

Dec 16, 2007 | Ruud UBHC Air Conditioner

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