You might also want to check and make sure there’s nothing clogging the vent especially the lint trap area. With as hot as it’s been it doesn’t take a lot extra to load up a system.
I’ve had problems in the past with that and it’s one of my maintenance points now, but like mentioned above, it could also be a bad breaker or connection. When/If you replace the breaker make sure to observe the wires for any scorching, melted insulation or poor installation from the factory….It happens!
Let us know what you find..!