GE Dryer temp control issues

Need help diagnosing a drying issue. On auto dry, only low temp works and takes forever but finishes with dry clothes. Doesn’t matter where temp setting is set. On timed dry, all temp settings are the same (feels low), even the fluff no heat setting has heat on timed dry. Timer always advances and completes cycles with dry clothes. Voltage is good at 220 at the plug, dryer vent is clear at output and volume seems normal. Have not disassembled. From reading, looks like there are 3 thermostats in play as well as moisture sensor, motor switch, temp control switch, and timer. Any ideas are much appreciated…