Gas dryer isn’t drying

Gilbert Hernandez asked 4 years ago
The vent hose had plenty of lint in it and I cleaned it all out.
The airflow coming out from the exhaust has significantly more airflow now.
The igniter is heating up and I can hear the solenoid opening up to allow gas flow through, and it does ignite off and on.
It seems that after the first few cycles, the dryer makes a different sound, the igniter heats up, but gas no longer allowed through so no ignition-no lasting heat.
Is there a sensor that is not allowing the solenoid to continue to open?
How would I identify it?