Thermador C271 Service Manual - page 52

THE OVEN DOOR LATCH

ASSEMBLY

The oven door latch locks the oven door during the

CLEAN cycle (see the illustration at the bottom of the

next column for the various latch positions). Refer to

page 2-18 to access the oven door latch assembly.

To test one of the latch switches:

1.

With no power applied, remove the wire con-

nectors from the switch terminals.

2.

Set the ohmmeter to the R x 1 scale.

3.

Connect one of the ohmmeter leads to the com-

mon (C) terminal of the switch.

4.

Touch the other ohmmeter lead to the  N.O.

(normally-open) switch terminal.  The meter

should indicate no continuity with the switch

in its normal position, and continuity when it is

activated.

5.

If the reading is not correct, remove and replace

OVEN DOOR LATCH

Motor Terminals

Com

Com

N.O.

N.O.

Lock 

Switch

Unlock 

Switch

  Latch Position

Lock Switch

Unlock Switch

       Unlatched

          Yes

           No

         Latched

           No

           Yes

the switch.

To test the door latch motor windings:

1.

With no power applied, disconnect the motor

wires from the terminal block and main harness

connector.

2.

Set the ohmmeter to the R x 100 scale.

3.

Touch the ohmmeter leads to the motor wire

connectors. The meter should read between

700 

Ω

 and 750 

Ω

 .

4.

If the reading is not within this range, remove

and replace the door latch assembly.

UNLATCHED POSITION

LATCHED POSITION

Lock Switch Open

UnLock Switch Closed

Lock Switch Closed

UnLock Switch Open

Door Latch Positions

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