Took Dryer apart all temperature sensors appear to be OK. Hot surface igniter also looked good show high resistance. Put the dryer back together and it appeared to be working fine with no clothes. Burner was lighting heat would cycle on and off for temperature. This worked for several cycles. So decided to put laundry in. With laundry in the drum Igniter glows but no gas ignition. Doesn't seem like laundry would make a difference maybe you have an idea what the problem is. Thanks for all your assistance