ApplianceField Lab
Field evidence

Closing the Door Started the Dryer Without a Display

This is an uncontrolled-start condition. The discussion focused on which relay or motor-switch contact could remain closed when no start command was visible.

Samsung Starts When Door Closes

What the symptom proved

  • The display did not turn on.
  • Closing the door caused the dryer to start automatically.
  • No start-button request was reported.
  • The behavior pointed to a contact remaining closed in the motor circuit.

A similar symptom can have a different cause on another dryer. This condition requires isolation before the appliance is used again.

The motor centrifugal-switch contacts inspected as an alternative to a stuck board relay.
The motor centrifugal-switch contacts inspected as an alternative to a stuck board relay.

The two branches discussed

Stuck-contact paths

Control-board relay

A welded or stuck relay can keep the motor output closed even when the user interface is not issuing a visible start command.

Motor centrifugal switch

The motor switch can wear or burn at its contact pad. The discussion recommended disconnected visual inspection of the contact assembly.

What was not confirmed

The exact model, electrical measurements and replacement result were not reported. A visually similar motor contact may fit several motors, but compatibility must be verified before replacing a contact assembly instead of the complete motor switch.

Uncontrolled-start safety: unplug the dryer and leave it out of service. Do not strike an energized board or bypass the door switch. Relay and motor-switch diagnosis requires qualified service.
Unexpected turn

A repair that did not follow the obvious path

An unusual turn supported by the case record Bosch E24 Returned After the Drain Pump Was Replaced A Bosch drained completely after a new drain pump but E24 returned. The case explains why circulation-pump rotor play became the next check.
Fresh field notes

Recently published cases

GE Monogram ZDT985SIN6II Had Both Pumps Inactive in Test Mode A GE Monogram ZDT985SIN6II would not drain, and neither pump ran in diagnostics. The case puts voltage, wiring, debris and air-gap checks before the … Cove DW24 Error 800140: Start with the Drain Path A real Cove DW24 case explains what error 800140 supports, what it does not prove, and how to separate the drain pump, hose and … Samsung Gas Oven Igniter Glowed but Could Not Hold the Valve A Samsung gas oven igniter glowed and the burner lit, but operation was unstable. Replacing the marginal igniter resolved the case.