John R Fishers , IN December 27, 2015 Appliance: Whirlpool Gas Dryer LGR4634JQ1 Whirlpool Dryer Lgr4634jq1: Not always heating then would not finish cycle. How to replace Timer (4-Cycle). Replaced timer 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes