Maytag LDG8424AAE Gas dryer..Will heat up..turn off..will try to light(ignitor glows)..but fails to light..will do this until timer has shut the unit off. I have replaced the heat sensor,hi limit thermostat and the cycling thermostat. By doing this the unit will heat up ..shut off..re-light..shut off ad re-light again..thought I had it fixed. Put a load of towels in and the problem returns. The vents are clear and moves air with a load and with out a load..My Question is if I replace the cut-off-T and valve coils next do you think this will fix the problem or do I cut my losses and buya new dryer know?? Thanks in advance for any help in this matter