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It is possible.Do you have a capacitance meter to check the start cap?
The start cap can be the issue.Without checking it we are guessing.You may indeed need a new compressor but it should not be condemned until the start cap and relay are verified to be within parameters.
Absolutely.Some Trane compressors do not require the start kit, but on those that do, it is absolutely necessary to boost the compressor off.
LRA simply means the compressor is drawing LOCKED ROTOR AMPS.
On this compressor that is probably over 100 amps. If compressor is mechanically seized or does not get enough jolt to crank it up, iy will draw Locked rotor amps. Again, he may be right that it is seized, but the start cap should be verified first before condemning compressor.
Give me full model on the unit.The XR13 is a series