If the igniter glows but the burner doesn’t light, then at least you know all the components in the control circuit are getting power. Watch the igniter for several minutes to see if it stays lit or fades off. The igniter should fade off to divert electric current through the gas valve coils to light the burner when the flame sensor detects that the igniter is hot enough.
When the flame sensor opens, electric current flows through the gas valve coils and the burner ignites. If the igniter glows constantly for 5 minutes, you'll need to replace the flame sensor because it isn't shutting off the igniter to divert current through the gas valve coils.
If the igniter continues to glow and then shut off only to repeat the cycle, the problem you have will be related to the gas coils or gas valve.
A restricted vent would cause the flame to short cycle but it would continue to cycle on and off.
In that case, either the coils are going bad after the first cycle or the gas valve is seizing up after the first cycle.
Be sure to use only Original Manufacturer Parts, as aftermarket parts like what you'd find on Amazon, will not likely work and only cause you replaces more and more parts. You can find parts, diagrams, and your owner's manual on www.SearsPartsDirect.com
, just enter your full model number.
Follow the steps in this DIY repair guide and video from Sears PartsDirect: searspartsdirect.com/diy/article/gas-dryer-wont-heat-troubleshooting-video
You can call Sears Home Services at 1-800-4-MY-HOME for repair.
Hope this helps!
If you need a new gas dryer, you can find Kenmore gas dryers here on Sears.com: sears.com/appliances-dryers-gas-dryers/b-1101275?Brand=Kenmore&filterList=Brand&shipOrDelivery=true&searsTab=true