When an electronic clothes dryer's digital display suddenly jumps from forty minutes remaining down to one minute or finishes instantly, the malfunction is typically caused by a dirty moisture sensor bar or an intermittent electronic control board glitch. Modern sensor drying cycles rely on clean metal sensor strips inside the drum to detect humidity; if a film of detergent residue covers the bars, the machine mistakenly assumes clothes are already bone dry. You can troubleshoot sensor issues easily. You can verify that your corrective action is successful when wiping down the metal moisture sensor bars with rubbing alcohol or white vinegar removes residue and allows the digital timer to count down accurately through a full cycle.
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