Maytag MFR Series Service Manual page 156

The second cause of the contactor contacts
not closing is worn or burnt contacts within the
contactor.
1. Check for proper line voltage (208-240V) at
the terminals marked L1, L2, and L3 on the
contactor.
2. Unplug washer or disconnect power.
3. Connect voltage measurement equipment.
4. Plug in washer or reconnect power and
confirm voltage reading is 208-240V.
5. Unplug washer or disconnect power.
6. If voltage is correct, move the meter leads
to the opposite side of the contactor.
7. Plug in washer or reconnect power and
confirm voltage reading is 208-240V at
L1, L2, L3 after the contactor is energized
and the coil pulls in. If not, replace the
contactor.
8. Unplug washer or disconnect power.
nOTe: Do not do the contactor contact test
by manually pushing in the contactor, as the
pressure on the contacts will be different
and could lead to a false diagnosis.
The third reason for a contactor failing is an
open coil. To check resistance at the coil:
1. Unplug washer or disconnect power.
2. Remove the two wires from the coil
connectors.
3. Check resistance across the two terminals.
Resistance should be approximately 525Ω.
An open circuit (infinite Ω) reading or a
reading of 20% difference higher or lower
is cause to replace the coil or the complete
contactor.
The fourth reason for a contactor not passing
voltage through it would be that the coil is not
getting voltage to it. To check continuity of the
connecting wire:
1. Unplug washer or disconnect power.
2. Remove the two wires from the coil and
from the control board.
3. Check the wires between the coil
connectors and the control board connector
for continuity (0Ω). If there is continuity (0Ω)
in both wires, then the problem is in the
control board. Replace the control board,
add the correct EPROM chip, reconfigure
and initialize the control board and check for
proper motor operation.
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