... Ok I disconnected and it seem to run fine.
... could it all be related to the valves?
seems to be related to the Vent
Dryer Vent 4" diameter
Vent should be rigid metal.
Short lengths of flexible metal may be OK, if not crimped when moving the Dryer into place.
Foil Duct Tape is OK.
With an empty load, Timed Dry, High Heat, the vent temperature should cycle somewhere between 135F and 160F
Check / clean the Dryer Vent
Disconnect the Dryer Vent and check for good air-flow there and where it exits the house.
Check the Vent air temperature at the back of the Dryer.
If you have a Harbor Freight Store near you,
$ 3.99 sometimes on sale for $ 2.99