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I have a trane 2twb0030a100ab outside unit which keeps

Customer Question
Hi, I have a...

Hi, I have a trane 2twb0030a100ab outside unit which keeps tripping the circuit breaker

Contractor's Assistant: Did you double-check the thermostat? And what about the unit's filters?

What do I check from the thermostat?

Contractor's Assistant: Do you plan on doing the work yourself?

Yes,

Contractor's Assistant: Anything else we should know to help you best?

Okay, will a thermostat replacement cause the condenser unint to keep tripping a breaker?

Submitted: 10 months ago.Category: HVAC
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Answered in 16 hours by:
9/25/2017
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,358
Experience: 51 years of experience install design and repair of all makes and models of AC
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Russ here. Sorry about wait. No thermostat replacement should not cause unit to kick breaker. Does it kick breaker right away or run for awhile first. Russ

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Customer reply replied 10 months ago
I disconnected the compressor and the fan worked fine without tripping the breaker. As soon as i connect the compressor the will trip.
Customer reply replied 10 months ago
It kicks the breaker right away.
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If it is kicking breaker you have a grounded compressor or bad capacitor. Everything works inside correct. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

Open up the panel on outside unit and check capacitor. The silver round component. See if it is oily or puffed up at top. Russ

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Customer reply replied 10 months ago
Capacitor wad the first thing i changed.a tech came by and said i need a new compressor and i got it and installed but it still keeps tripping.
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If you replaced compressor. Wired it correctly. replace breaker it maybe weak. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If compressor keeps kicking breaker. It may have been diagnosed wrong. Disconnect compressor at the compressor and tape connections retry system. If it runs you may have bad or weak breaker. If it kicks breaker fan motor or sump heater if it has one. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If fan runs and does not kick breaker you have weak breaker. Russ

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Customer reply replied 10 months ago
1. What is sump heater and were will it be located base on the modwl i gave you?
2. The disconnected it from the compressor side and taped the terminals and the fan run without tripping breaker but when i connected the compressor it made some hissing noise at the breaker and tripped. Thanks
Customer reply replied 10 months ago
Note, i had replaced the breaker before i replaced the compressor.
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If you have an ohmmeter check resistance on windings and to ground. Russ

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Customer reply replied 10 months ago
Will do asap. Thanks
Customer reply replied 10 months ago
What do i look for on the windings to ground?
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

If you have a winding shorted it will read ohms. If you have any resistance to ground compressor is grounded. Russ

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Customer reply replied 10 months ago
Will check and get back to asap.
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

Winding shorted will read 0 ohms.

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Customer reply replied 10 months ago
Hi,
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

Was that a used or new compressor you installed.

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Customer reply replied 10 months ago
New from trane dealer. Came in an unopened box.
HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

What were your readings. Russ

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HVAC Technician: gotoman for ac, HVAC Technician replied 10 months ago

You still need help. Russ

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