I have a amana tandem 7300 dryer. I have source power but nothing comes on. no lights at all. What could be the issue and is it repairable?

The only reset is to unplug the machine from power for about 5 min's and if that fails you may need to replace the washer timer control board.

Sometimes this can happen when the power button does not return completely when pressed in. My cheap & cheerful solution was to use a bit of Blu-Tak on the button, so I could pull it all the way out.

Yes, the dryer has a heat sensor.

could be that the belt has come off of is jammed take the back off if it come off and take a look or turn on it side and look under it could also me a wight has come off and jammed

there should be a reset button in front of the machine on the right side..hold until you hear a click from the door. or go to
How-2 repair.com

check for thermal fuse blown or bad door switch

usually one of 2 things,either the 240volt heating element is shorting out to the element housing or the dryer drum motor has bad windings or the end bearings are dried out causing the motor to work harder and draw excessive current to start and keep running

Did you find a solution? Mine is doing the same thing.

Door won't unlock
Did all of the water drain out of the washer during the spin? Select DRAIN & SPIN to remove any water remaining in the washer. The washer door will unlock at the end of the drain.
Is the door locked and is the "Add Garment" light on? Press START/PAUSE once. The door will unlock.