How to test a mechanical timer (washer, dryer) contacts and motor
Mechanical timers are a small motor driving a cam stack that opens and closes many contacts. You need the timer chart (on the wiring diagram) to know which contacts should be closed at each dial position.
Single source ~45 min advancedBrands: All
Before you start
- Unplug the appliance or turn off the breaker before opening panels or disconnecting parts
- Take a photo of the wiring before removing any wire
- Resistance and continuity tests are done with power OFF and the part isolated
Diagnostic steps
Unlock all 6 steps with expected values
Full library + AI assistant for $34.90, one time.
Get lifetime accessOnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.
