Whirlpool Refrigerator E5 Error & Ice Maker Repair in Port St. Lucie

Quick symptom overview

Whirlpool, Maytag, KitchenAid, and JennAir French door and side-by-side refrigerators display E5 on the ice maker status display, water dispenser screen, or diagnostic test mode (Test 36) when the main control board (W10861652, W11035133, W10312695) detects an open or shorted circuit on Ice Maker Thermistor Assembly W10871101 (or integrated thermistor inside Modular Ice Maker W10873791 / W10300024).

The ice production circuit consists of: Main Control Board → cabinet door wiring harness → 6-pin/10-pin molex connector → NTC thermistor sensor W10871101 clipped to the underside of the aluminum ice mold → 120 VAC harvest motor. The thermistor measures mold temperature to determine when water is fully frozen. When the mold reaches 15°F (-9°C), the control board initiates a harvest cycle (heats mold, turns motor, and energizes fill valve). If door flex fatigue, moisture intrusion, or NTC element degradation causes the thermistor to read open (∞ Ω), shorted (0 Ω), or out of calibration, E5 is logged and ice production halts.

E5 with complete halt in ice production: Thermistor failed open (∞ Ω) or wire broken inside cabinet door flex hinge. E5 with hollow or slushy ice cubes: Thermistor resistance drifted low, causing premature harvest before water is fully frozen. Related Whirlpool repair guides: Whirlpool / Maytag washer F7E1 & F7E5 drive hub guide, Whirlpool washer F8E1 no fill water inlet valve guide, and Whirlpool electric dryer F01 main control board guide. Local service category: Whirlpool appliance repair.

Safety: Unplug the refrigerator power cord before disconnecting door hinge harness plugs or removing the ice maker module. Avoid touching live 120 VAC pins on the ice maker fill heater or harvest drive motor.

Step-by-step diagnostic hierarchy

1. Perform Service Diagnostic Test 36 (Power ON — self-test) — Enter service diagnostic mode by pressing Door Switch + Light Switch or console keys per tech sheet:

   • Advance to Test 36 (Ice Maker Thermistor Temperature):
     • Display shows “E5” or “99”: Open thermistor circuit (∞ Ω).
     • Display shows “00” or “-40”: Shorted thermistor circuit (0 Ω).
     • Display shows actual mold temperature (e.g., 12°F): Thermistor is reading normally; test harvest motor in Test 37.

2. Measure thermistor NTC resistance at ice maker plug (Power OFF — meter check) — Unplug refrigerator, remove ice bucket, and unbolt ice maker module (2 1/4“ hex screws):

   • Unclip molex wire harness plug from ice maker housing.
   • Set multimeter to 200k Ω (20,000 Ω) scale:
     • Measure across thermistor terminals (Pin 3 and Pin 4 on standard 6-pin plug):
     • 70°F (Room temp): Expected 2.5 kΩ to 3.0 kΩ (2.7 kΩ nominal).
     • 0°F (Freezer temp): Expected 30 kΩ to 35 kΩ (32.5 kΩ nominal).
   • Result: ∞ Ω (Open circuit): NTC sensor element severed → replace Thermistor Harness W10871101 or Ice Maker W10873791. < 500 Ω (Shorted): Replace thermistor assembly.

3. Check door hinge wiring harness for flex breaks (Power OFF — harness check) — Remove lower door hinge cover at bottom of refrigerator door:

   • Unclip main door wiring harness connector:
     • Set meter to 200 Ω range and test pin-to-pin from main PCB header P12 to ice maker plug:
     • Expected continuity: < 0.5 Ω per wire.
   • Result: ∞ Ω on door harness wire: Door flex fatigue fractured copper wire inside hinge sleeve → repair wire pin or replace door wire harness.

4. Inspect and replace Main Control Board W10861652 (Power OFF — board check) — If thermistor reads 2.7 kΩ (70°F) / 32.5 kΩ (0°F) and door harness continuity is < 0.5 Ω:

   • Inspect main PCB behind rear cabinet panel for burnt trace resistors near header P12.
   • Replace Main Control Board Assembly (W10861652 / W11035133) if thermistor input channel is damaged.

Multimeter and safety checks

Disconnect AC power cord before taking resistance readings or unplugging door harness connectors.

Component / Test	Setup & Meter Range	Expected Normal Value	Fault / Failure Mode
Thermistor (70°F Room Temp)	Across thermistor harness pins, 20k Ω	2.5 kΩ–3.0 kΩ (2.7 kΩ)	∞ Ω (open thermistor; logs E5) or < 500 Ω (shorted)
Thermistor (0°F Freezer Temp)	Across thermistor harness pins, 200k Ω	30.0 kΩ–35.0 kΩ (32.5 kΩ)	Resistance fails to rise when cold (causes no ice)
Harness Wire Continuity	Pin-to-pin board P12 to ice maker, 200 Ω	< 0.5 Ω per line	∞ Ω (broken wire inside cabinet door hinge)
Mold Heater Resistance	Across mold heater pins, 200 Ω	72 Ω–95 Ω	∞ Ω (burnt mold heater element)

Root cause vs repair breakdown

Observable Symptom	Root Cause / Faulty Part	Corrective Repair Action
E5 code, thermistor reads ∞ Ω	Open NTC thermistor element	Replace Ice Maker Thermistor W10871101 / Ice Maker W10873791
E5 code, thermistor reads ∞ Ω at hinge plug	Broken harness wire in door hinge flex area	Repair broken wire conductor or replace door harness
E5 code, thermistor reads 2.7 kΩ / 32.5 kΩ	Failed ADC thermistor input on main PCB	Replace Main Control Board Assembly W10861652
Soft/slushy cubes ejected into bin	Thermistor drifted 10 kΩ low off calibration	Replace Ice Maker Thermistor Assembly W10871101

FAQ

What does E5 mean on a Whirlpool French door refrigerator?

E5 indicates an Ice Maker Mold Thermistor Circuit Failure. The main control board (W10861652 / W11035133) detects that resistance from NTC thermistor sensor W10871101 (or embedded inside modular ice maker W10873791) is out of the 1.5 kΩ to 85 kΩ valid operating window.

How do I test Whirlpool ice maker thermistor W10871101 with a multimeter?

Unplug the refrigerator, remove the ice bucket, and unclip the 6-pin or 10-pin ice maker wiring harness. Set multimeter to 20k Ω (20,000 Ω) range: test across the 2 thermistor harness pins (typically Black-to-Black or Brown-to-White). Expected resistance at room temp (70°F) is 2.7 kΩ (2,700 Ω); at 0°F ice harvest temp, expected resistance rises to 32.5 kΩ.

Why does E5 cause the Whirlpool ice maker to stop making ice?

The main control board will not energize the harvest motor or water fill valve until thermistor W10871101 signals that the aluminum ice mold has dropped to 15°F (-9°C) or lower. If the thermistor fails open (∞ Ω), the board senses a false high temperature and holds the ice maker in a permanent pause state.

Do I replace thermistor W10871101, ice maker W10873791, or main control board?

If thermistor resistance is open (∞ Ω) or shorted (< 200 Ω), replace Ice Maker Thermistor Harness W10871101 or complete Modular Ice Maker Assembly W10873791. If thermistor resistance reads normal for mold temperature and harness wires read < 0.5 Ω to main board header P12, replace Main Control Board W10861652.

When to schedule professional service

If main control board replacement, door hinge wiring harness repair, or sealed system cooling diagnostics is required, certified Whirlpool refrigerator technicians are ready to assist. Schedule Whirlpool refrigerator repair → or contact our technical department.