The 3MP series is often "self-resetting," meaning it should close again once it cools down. If it stays open (infinite resistance) even when cold, the internal bimetallic disc is likely damaged or "fixed" in the open position.
In some DIY scenarios, users lightly tap the casing to unstick the disc, but this is a temporary band-aid.
Use a multimeter to check for continuity across the two terminals of the 3MP unit while the machine is unplugged. Beep/Low Ohms: The protector is closed (normal state). No Beep/Infinite Ohms: The protector is "tripped" or blown. 2. The "Temporary" vs. Permanent Fix 3mp31702 fix fixed
The 3MP is typically clipped onto the motor windings or held in a small plastic bracket. Carefully slide the connectors off the terminals.
Fixing a (a specific model within the Sensata Klixon® 3MP Series ) usually means dealing with a motor that won’t start or keeps cutting out. This component is a thermal motor protector designed to snap open and cut power if your appliance's motor gets too hot or draws too much current. The 3MP series is often "self-resetting," meaning it
Your motor starts for a few seconds, then dies, or won't start at all even after cooling down.
If you are looking to "fix" a situation involving this part, you are likely working on a vacuum cleaner (like a Miele C3 ), washing machine, or pump. Here is how to diagnose and resolve the issue. 1. Confirm the Failure Use a multimeter to check for continuity across
If you've determined the 3MP31702 is dead, you can find replacement Klixon parts online.
Replace the unit. These are precision-calibrated safety devices; attempting to pry open the metal housing to "fix" the internal contacts is a fire hazard. 3. Address the Root Cause