I had a 3 1/2 ton split unit Intertherm. Not sure of the model number. The outside fan is not working. I hear a humming noise and the unit is warm to the touch. I turned the unit off and waited 5 minutes then turned it back on and the ac worked and the fan was running. After about 5 minutes it stopped again and is making a squealing noise. Any advice before calling a repair man??
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Is the outside running? Is the outside fan running? Probably what is happening the fan outside quits running and the compressor gets hot and goes into thermal overload. need to check to make sure the outside fan is running.
First thing I would look at is to make sure you have power at the disconnect 110 coming in on each leg to unit. Second, I would look at the capacitor for obvious bulging or leaking Third I would check to see if the contactor has burnt points or bugs in it. Your disconnect may have fuses in it which may have failed as well .
(All checks of the unit with power off to all breakers as there will be more than one double breaker supplying power to the unit).
The hum you hear indicates that the contactor is pulled in on the outside unit but still may be burnt or have ants or earwigs especially in between the contacts
. The capacitor can hold a charge even after equipment is off so discharge it to the chassis before removal. Replace only with same Microfarad rating and equal voltage or higher Remember to mark the wires as to which came off the HERM / C/ FAN terminals or take a cell phone picture.
I have just replaced my intertherm condensing unit after it had it's 3rd compressor failure. It was more cost effective than buying a compressor and hoping all the other components were going to last.
The buzzing noise is probably the fan motor. Is the compressor running? First make sure that there are no tripped breakers. After that kill the power and check the capacitor with a multimeter. If that checks good then check the fan motor windings with the multimeter. Let me know if you have any questions.
not sure if it is a package system or a split but this is what you do.go outside where your outdoor machine is, after it has been shut off for awhile, and you should hear 2 distinct noises.1 is the outdoor fan, you should see it spinning.the other is a comppressor hum.some compressors have noise bags on them so listen closely thru the fan noise.if you hear no hum listen for a hum about every 2 to 5 minutes.if you hear this hum every so often, chances are you compressor is seized or stuck.the only thing to do there is get a tech and try a big boost to get it going.
Motor, wiring and/or capacitor. If the sticker on the side of the motor isn't burned off you can get the motor info off that. Model numbers from the motor do little for locating the motor but my help. Best thing to do is get the AC motor specs and look up online (cheapest) or go to a motor shop. The specs you need would be as follows.
Horsepower-Such as 1/4 or 1/3
Voltage-Most likely 240/1 (240vac single phase)
Rotation-CW/CCW looking at the shaft end of the motor
you have a missmatched system, for it to work try removing the orfice on the high side txv it is not allowing the evaperator coil to fill with refrigerant properly coleman and intertherm dont like each other since they control a large market in the manufactured housing heating and cooling units electricaly connecting the componets together no issue prefromance sometimes is the issue hope this helps