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The outside fan always running - Carrier Heating & Cooling

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  • Carrier Master
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Either your thermostat is not getting completely satisfied and the unit is always calling for cooling or it is possible that one pole of the contactor is welded fast and not breaking which could keep the fan running all the time. Either way you should have the unit serviced to find out what is going on. If the t-stst is not being satisfied then there are some other possible issues that could be a problem and should be looked at. These could include low refrigerant or holes in the ductwork.

Posted on Nov 14, 2009

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Posted on Jan 02, 2017

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Is the condersor fan supposed to run for the same length of time that the compressor run


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Outdoor fan will stop running and compressor overheats and shuts off. it wont come back on til u reset it at the thermostat. the outdoor unit has a new compressor and fan motor.


I realize the outdoor unit has a new compressor and fan motor - therefore - both those components should be ok - however - the fan motor 'should not' be going off - and the fact that it is going off is what is causing your compressor to overheat and shut off.
The reason the fan motor is going off is - it is bad (breaking down electrically) and is going off on the internal overload. If this is the case (a) the motor needs to be replaced or (b) it's possible that the fan capacitor needs replacing; but fan capacitors generally do not cause much problem, and when they do go bad they usually develop an obvious (to the eyes) bulge. If the capacitor has a bulge in it - I would surely change it out -and probably would (as a shot in the dark) anyway - since they are relatively cheap ($10-$15).
In your complaint you say that "the outdoor fan will stop running and compressor overheats and shuts off." If it happens 'exactly' that way then I'm betting your problem will be that the fan motor is defective as mentioned above, with an outside chance of the capacitor being defective, in which case if it isn't the capacitor - you will need a new fan motor. Note: outside fan motors are notorious for being fickle and it would not surprise me in the least to find a fairly new outside motor that is defective. I would check and see if you had any warranty on it.
All that being said - it is also possible that your outside unit has a 'high pressure cut-out switch,' although most units don't have them anymore, these days. However, if you have such a switch - it is possible (very likely) that it is shutting off the AC. Note: a high pressure cut-out switch will 'shut the entire outside unit off,' not just the fan motor. If that is what is happening then there's a good chance you have such a switch.
If it is happening that way, (the entire outside unit stops) then I would try 'washing the outside coil' really, really good and see if it will run ok afterwards.
Note: outside coils are sometimes difficult to get clean - sometimes requiring you to disassemble to some degree in order to make sure you get them clean.
Always, Always turn all power (including inside thermostat) OFF when washing the outside coil.

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raodonald

If you are having trouble with your fan running it is possible that the notebook is over heating.

Think about when it ran good and when it did not. Was the fan running and/or was it cooler at that time. Also if you are in a place where it is cool outside you might take the system outside in the cool to see if this makes a difference.

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