# How to Fix Whirlpool Error F08 (Heater Circuit Fault)
The F08 error code is one of the most common service codes on modern Whirlpool washing machines, particularly models with internal heating capabilities (e.g., front-loaders or high-efficiency top-loaders).
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## Explanation: What Error F08 Means
The F08 code signifies a **Heater Circuit Fault**.
In plain English, the electronic control board (PCB) attempted to turn on the heating element to warm the water but did not detect the expected increase in temperature, or it detected a fault (open circuit or short circuit) within the heating system itself.
**Symptoms you will notice:**
* The washing cycle stalls, especially during a hot wash phase.
* The wash completes, but the water is cold.
* The machine may flash the F08 code immediately upon starting the wash cycle.
**The most likely culprits (in order):**
1. **The Heating Element:** The element has burned out or developed an open circuit. (Most common cause)
2. **NTC Thermistor (Temperature Sensor):** The sensor that monitors water temperature has failed.
3. **Wiring:** A loose connection or damaged wire leading to the element.
4. **Control Board (PCB):** A failed relay on the main circuit board (least common).
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## Step-by-Step Fix: Diagnosing the Heater Circuit
** SAFETY WARNING:** You will be testing electrical components. Always unplug the washer from the wall outlet before removing panels or handling internal components.
### Step 1: Access the Heating Element
The location of the heating element depends on your specific model:
* **Front-Loaders:** The element is typically located at the bottom front, accessible by removing the bottom front service panel (kick plate) or sometimes by removing the rear panel.
* **Top-Loaders:** Usually accessed by tilting the machine back and removing the bottom access panel, or by opening the front cabinet.
Identify the element. It is usually a U-shaped or coiled metal rod with two wires attached to terminals, often located near the tub’s base. You may also see a small sensor (the NTC thermistor) attached to the center of the element.
### Step 2: Visual Inspection
With the machine unplugged and the element accessible:
1. **Check Wiring:** Inspect the wires leading to the element for any signs of chafing, burning, or corrosion at the terminals.
2. **Look for Leaks:** Check the seal where the element enters the drum. A water leak here can short the terminals.
3. **Inspect the Element:** Look for obvious signs of burning or blistering on the metal rod itself.
### Step 3: Test the Heating Element (Resistance Test)
The most definitive diagnostic step is using a multimeter set to Ohms ($Omega$) to test the resistance of the heating element.
1. **Disconnect Wires:** Carefully disconnect the two main power wires attached to the heating element terminals.
2. **Test Resistance:** Place one multimeter probe on each of the two main terminals of the heating element.
| Expected Resistance (Good Element) | Fault Diagnosis (Bad Element) |
| :— | :— |
| **15 to 30 Ohms** | **0 Ohms or less:** Short circuit (rare, but possible). |
| | **”OL” or Infinite Resistance:** Open circuit (most common failure). |
**If your multimeter reads “OL” (or the highest value possible), the heating element is dead and needs replacement.**
### Step 4: Test the NTC Thermistor (Temperature Sensor)
If the element passes the resistance test (reads 15–30 Ohms), the problem might be the NTC sensor, which tells the board how hot the water is.
1. **Locate Sensor:** The NTC is often clipped onto the element or located next to it, connected by smaller wires.
2. **Test Resistance:** Test the two terminals of the NTC sensor. Unlike the heating element, the NTC resistance varies drastically based on water temperature (usually 50,000 Ohms at room temperature, decreasing as it gets warmer).
3. **Diagnosis:** If the sensor reads “OL” (open circuit) or 0 Ohms, it has failed and must be replaced.
### Summary of Diagnosis
If the heating element reads outside the 15–30 Ohm range, it is the root cause of the F08 error. Replacement is straightforward once the specific part number for your model is identified.
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Check the price for a replacement Heating Element here: https://www.amazon.com/s?k=Whirlpool+Heating Element&tag=trivian-20