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Replaced ECM on my Carrier Heat Pump. Fan still does not run. it starts to move, but stops

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It could be the capacitor..
What you describe is very typical behaviour of a bad capacitor..
Should not cost to much..
Be SURE the power is off when you replace it..

Enjoy your day..

Posted on Sep 10, 2009

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1 Answer

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Make sure the capacitor is connected to the start lead, not the run lead(s). Also some fans come with some wires you can switch to reverse the direction. If your motor has them there will be 4 and the label on the motor will tell you how to connect them. Let me know if you need more assistance or if this helps.

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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

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1 Answer

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1 Answer

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