Control Cavity 9–4
Thermal Protector
The thermal protector keeps the motor from running too long above its rated amperage,
preventing possible motor or pump damage. This is an auto-reset switch; two wires are
permanently attached to the protector on the normally closed contacts.
A second thermal is wound into the windings of the motor and protects the motor from
overheating. If the motor goes above the preset limits, the thermal protector will cut the power
to the pump until it cools down. Both thermal switches will reset themselves automatically.
The motor thermal switch is not replaceable.
Pump Cable Meg Check
• Good: 500M or higher
• Marginal: Between 200M & 500M
• Bad: Below 200M
1. With the control bracket removed and no wires touching the chassis or each other,
meg test at the EQD between each pin.
2. If you get bad readings, remove the EQD plug insert and retest at the wires.
3. If bad readings go away, replace the insert and retest at the pins.
4. If bad readings persist, replace the cable.
Note: This test is performed with the switches still connected, assuming that they are good. If the
level sensor assembly has not been entered and you get bad readings, see Chapter 8 –
Level Sensor.
Motor Cavity Water Test
1. With the controls removed, remove the ground screw and install the air test tting.
2. Pressurize the compartment to 5 psi.
3. Turn the assembly upside down and remove the hose from the test tting. Look
for water escaping from the motor cavity. If water is noted, the motor will need new
bearings and the windings will need to be cleaned, dried and tested.
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