Voltage phase detection for a laundry appliance

A method for operating a laundry machine comprising a drum configured to receive laundry, a motor configured to rotate the drum, at least one electric heating element configured to produce heat, an airflow path extending from the at least one electric heating element to the drum;

• and an analog to digital converter (ADC) configured to sample an AC voltage from a first power line of a group of power lines electrically connected to the laundry machine, and a controller, the method comprising:
• (a) sampling, by the controller, an AC voltage from the first power
• (b) determining, by the controller, a timing of occurrence of a peak value of a sampled AC voltage from the first power line,
• (c) comparing, by the controller, the timing of occurrence of the peak value to a plurality of predetermined timing signatures,
• (d) choosing, by the controller, one timing signature of the plurality of predetermined timing signatures based on a comparison of the timing of occurrence of the peak value to the plurality of predetermined timing signatures, and
• (e) controlling, by the controller, power to the electric heating element based on a chosen timing signature of the plurality of predetermined timing signatures.