Product review (5 stars): Easy to install as a pair
had an intermittent NO-Heat problem.  Kenmore HE3 front load (GAS) dryer.  The flame would come on when the dryer was started but would not reignite for heat later in the cycle.  Easy to install as a pair, with instructions, and a good price from Amazon vs Sears parts direct.  I changed the Wheel / belt / pulley kit, and the Thermistor, as well as these gas control valves.  Dryer works like new at 12 years old.