Manitowoc E25

What does Manitowoc E25 mean?

E25 indicates a fault with the bin level low probe sensor. Manitowoc machines equipped with multiple bin level probes use them to detect ice accumulation at different heights in the storage bin. The low probe is the first to be submerged as ice builds up. E25 means the control board is reading the low probe as failed — either open, shorted, or not responding within the valid range.

Symptoms

• Machine shuts down with E25 in the event log.
• Machine continues making ice despite the bin being full (if probe reads absent).
• Machine halts production even though the bin is visibly empty (if probe reads false full).
• Bin level LED on the control board corresponding to the low probe does not behave correctly.

Common causes

• Heavy mineral scale coating the low bin probe rod, altering its conductivity reading.
• Low probe connector loose or corroded at the control board.
• Low probe wiring harness damaged or broken.
• Bin probe physically bent, cracked, or displaced from its mounting position.
• Control board bin probe input circuit failure.

Diagnostic steps

1. 01

   Clean the low bin probe

   Remove the low bin probe and clean the rod with a soft cloth and Manitowoc cleaner. Heavy scale on the probe rod disrupts the conductivity measurement the control board uses to detect ice contact.

2. 02

   Inspect probe connector and wiring

   Power off the machine and check the low probe connector at the control board for corrosion or loose pins. Inspect the probe wiring from the board to the bin for damage.

3. 03

   Verify probe mounting position

   Confirm the low probe is installed at the correct height in the bin per the installation diagram. A probe that has shifted position detects ice at the wrong level.

4. 04

   Test probe continuity

   Disconnect the low probe from the board and use a multimeter to test continuity from the probe rod tip to the connector. An open reading indicates a broken internal connection — replace the probe.

5. 05

   Replace the low bin probe

   If cleaning and wiring checks do not resolve E25, replace the low bin probe assembly with the Manitowoc-specified part for the model. Mount and wire per the installation diagram.

When to call a professional

If probe replacement and wiring repairs do not clear E25, the control board bin probe input circuit is faulty. Engage a factory-trained technician to verify and replace the control board if needed.