# How to Fix Frigidaire Error E59 (No Tacho Signal)
The Frigidaire error code “E59” indicates a problem with the washing machine’s motor sensing system, specifically that the main control board is not receiving a signal from the motor’s tachometer (often called the “tacho”).
This guide will help you understand what this error means and provide a clear, step-by-step process for troubleshooting and resolving the issue.
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## Explanation: What E59 Means in Plain English
The E59 error is essentially a **”Motor Speed Not Detected”** fault.
* **Tachometer (Tacho):** This is a sensor built into or connected to the main motor that measures the speed at which the drum is spinning. It sends this speed data (the “Tacho Signal”) back to the main control board (or the Motor Speed Control Board).
* **The Problem:** When the machine tries to run a cycle (especially spin), the main control board attempts to start the motor. If it doesn’t receive the expected speed signal back from the motor within a few seconds, it triggers the E59 error and shuts down the cycle.
**The likely culprit for this failure is the Motor Speed Control Board.** While the motor itself, wiring, or the tacho sensor could be at fault, the specialized board that manages and translates the speed signals often fails first.
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## Step-by-Step Fix: How to Diagnose Error E59
**SAFETY FIRST:** Before performing any checks, always unplug the washer from the wall outlet or turn off the circuit breaker to eliminate the risk of electric shock.
### Step 1: Check for Simple Interference (Power Cycle)
Sometimes the error can be triggered by a temporary glitch or power fluctuation.
1. Unplug the washing machine for 5 minutes.
2. Plug the machine back in.
3. Attempt to run a short “Spin Only” cycle.
* *If the error is gone,* the machine is fixed.
* *If the error persists,* proceed to Step 2.
### Step 2: Inspect the Motor Wiring and Connections
A loose or damaged wire harness is a common, cheap, and easy fix.
1. **Access the Rear Panel:** Carefully slide the washer out and remove the rear access panel (or the lower front panel, depending on your model) to access the motor components.
2. **Locate the Motor:** The main drive motor is typically located beneath the drum.
3. **Check Harnesses:** Inspect the wiring harness connecting the main control board to the Motor Speed Control Board, and the wiring from that board to the motor itself.
* Look for crimped, frayed, or disconnected wires.
* Firmly press on all electrical connectors (plugs) to ensure they are seated correctly on both the motor and the control boards.
4. **Check for Obstructions:** Ensure no foreign object (like a coin or piece of clothing) has jammed the motor or interfered with the sensor wiring.
### Step 3: Test the Motor Speed Control Board (The Main Suspect)
The Motor Speed Control Board (also known as the Inverter Board, Drive Board, or simply the E59 board) is the component most frequently responsible for this error.
* **Location:** This board is typically mounted near the motor or sometimes attached to the outside of the wash tub.
* **Function:** It is responsible for regulating the power supplied to the motor and receiving/interpreting the tacho signal.
**Diagnosis:** Unless you have specialized equipment to test circuit board continuity, visual inspection and replacement are the most practical diagnostic methods for this component.
1. **Visual Inspection:** If you can access the board, look closely for obvious signs of failure:
* Burn marks, especially around capacitors or resistors.
* Swollen or cracked components.
* Melted plastic smells.
2. **Replacement:** If the wiring is secure and the motor spins freely by hand, the only reliable way to confirm the board failure is to replace the Motor Speed Control Board. When this board fails, it stops providing power correctly, fails to read the tacho signal, or both, resulting in the E59 error.
### Step 4: Consider the Main Control Board or Motor (If E59 Persists)
If replacing the Motor Speed Control Board does *not* resolve the E59 error, the problem shifts to one of two expensive components:
1. **The Motor Itself:** The tachometer sensor may be integrated into the motor and has failed internally.
2. **The Main Control Board:** Although less common for E59, the main board may be failing to communicate correctly with the Motor Speed Control Board.
If the E59 error persists after replacing the dedicated Motor Speed Control Board, professional assistance is recommended, as further testing requires advanced diagnostics.
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Check the price for a replacement Motor Speed Control Board here: https://www.amazon.com/s?k=Frigidaire+Motor Speed Control Board&tag=trivian-20