I had a 3.5 ton 14 SEER Amana RCE36C2C compressor installed as part of a new system a year ago. At the time, I thought it was kind of loud at startup. It makes a loud groaning noise until it gets up to speed, then runs quietly. I asked the contractor about this and he said it was normal.
Is it normal for an AC compressor to be noisy at startup? Is this hard on the motor or compressor? Is this something a hard-start capacitor could potentially help?