gas dryer heating intermittent

1)Pulled electrical connectors off each of two gas valve coils. 2)Removed two Phillips screws and removed coil retainer bracket. 3)Lifted off two old coils and replaced with two new coils. 4)Replaced coil retainer bracket and plugged back connector on each coil; total coil replacement time is less than two minutes. 5)Confirmed gas valve opens and gas ignites every time over a two day test period. 6)Re-installed door. Wife Happy. We spent under $20 for 'M' series new style coil kit; and the $7 shipping got it here in two days. What a deal! Terry Rahmer 8.24.2012