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What is model on the air handler?
The problem is rare but not totally uncommon. The issue is caused by harmonic distortion being introduced into the AC power lines. This is caused by the non-sinusoidal current draw by the ECM motor. The DC power supply of the motor pulls power from the AC line in two sets of pulses at each AC peak, rather than in a smooth sinusoidal manner, as with a conventional PSC motor.
The normal solution is to install a choke in the motor hot lead,
Ask your installer to contact his York rep as to the proper choke he should install.
If unit already has a choke, have him replace it.
See link below for more information