dE means the dryer doesn’t detect the door as fully closed, usually something is in the way rather than a broken switch.
dE appears when the dryer’s door switch doesn’t register the door as closed. Most of the time something, lint, a stray sock, is caught in the door opening rather than the switch itself being faulty.
The information provided here is a diagnostic aid and does not replace the intervention of a qualified professional.
No cause is certain until it has been checked on the appliance.
An error code varies by brand
The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.
When to call a professional
If the simple checks turned up nothing, if the repair involves electricity, gas, or the sealed refrigerant system, or if you have any doubt at all: stop there and hand the appliance over to a qualified technician.