Dryer Ignitor Glows but no Flames

Hi I a Whirlpool dryer wgd5900sw0 that only heats intermittently. The ignitor glows but no flames. I’ve replaced the thermofuse and the solenoids but no luck. Is it possible that the ignitor will glow but not get hot enough to light the flame. I’m thinking about replacing the ignitor and would appreciate any help. THanks in advance!
Ken G.

try testing the flame sensor

I’m putting in the new ignitor tonight if that doesn’t work then on to the flame sensor, thanks!