Capacitor in the outdoor A/C condenser unit

Old 10-15-18, 04:14 PM
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Capacitor in the outdoor A/C condenser unit

My A/C isn't cooling enough even though the fan on the outsider condenser unit spins fine. It feels like the two copper lines coming out of the outside unit is about same temp so I suspect that I could have a leak some place, but since I don't know if the condenser is running, I would like to try the cheapest approach to possibly fix this before hiring to find the leak/refill or replacing the entire AC system. I'm guessing I have the two capacitors (one for the condenser, and another for the fan) in a can. Can you folks advise me? The A/S system is about 13 years old Trane 3 ton unit, and my HVAC is a split system meaning my heater runs just fine on gas. Can you offer me your expert advise in replacing the capacitors please?

I really would like to try the least expensive approach before forking out a couple of thousand dollars to replace the whole AC.
Old 10-15-18, 05:19 PM
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If you want to try replacing the capacitor, it's not that expensive. You do have a dual capacitor (2 capacitors in one can). You need to remove the mounting bracket from the capacitor to see what the values are. Get a capacitor that has the same mfd values. The voltage rating can be the same or higher. However, if the system is low on refrigerant, replacing the capacitor won't restore proper operation.
Old 10-15-18, 07:19 PM
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You should be able to hear if the compressor is running. It makes a slight buzzing noise.
Old 10-15-18, 11:23 PM
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If the two refrigerant lines are the same temperature..... it can't be cooling at all.

That cap looks to be date coded 1991.
It's not the original and looks to be slightly bulged where the terminals are..

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