No heat on dryer, drum spinning normally

Watched that igniter glowed for usual 15 seconds. Gas did not flow so tested solenoids for ohm resistance across leads. One was bad, less than 1350 oms (as I recall). Ordered the M series coil (solenoid) kit at Part Select, arrived the next day. Replaced them in 5 minutes. Took about 15 minutes to vacuum lint + dust out base of dryer area. 5 more min to put front of dryer 4 screws in and mount dryer door!