# How to Fix Frigidaire Error E45 (Door Lock Board)
The E45 error code is one of the more frustrating faults in modern Frigidaire washing machines because the issue often points to a component that is expensive to replace, even though the error description seems simple.
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## 1. Explanation: What Frigidaire Error E45 Means
The Frigidaire E45 error code indicates a communication failure related to the **Door Lock Board** system.
While the door lock mechanism itself may appear fine or functional, the code suggests that the **Main Control Board** (sometimes called the CCU or MCU—the central electronic brain of the washer) is failing to receive, process, or properly monitor the status signal from the door lock.
**In 90% of cases for this specific code, the main culprit is the Main Control Board, not the door latch itself.** The control board has developed an internal fault that prevents it from correctly interpreting the signals necessary to proceed with a wash cycle.
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## 2. Step-by-Step Troubleshooting Guide
Follow these steps sequentially to confirm the diagnosis and perform the repair.
### Step 1: Perform a Power Cycle Reset (Soft Reset)
If the E45 error appeared during a storm or a brief power fluctuation, it might be a temporary glitch.
1. **Unplug the Washer:** Disconnect the washing machine completely from the wall outlet. Do not simply turn it off.
2. **Wait:** Leave the machine unplugged for a minimum of 5 minutes. This allows the capacitors on the control board to fully discharge and clear any temporary error states.
3. **Plug Back In:** Plug the washer back into the outlet.
4. **Test:** Try to run a short cycle. If the error clears, the problem was transient. If E45 returns, proceed to Step 2.
### Step 2: Check the Physical Door Latch and Harness
Before assuming the expensive board is faulty, ensure the actual door latch assembly and its wiring are intact.
1. **Inspect the Door:** Open and close the door several times, ensuring a firm, secure close.
2. **Look for Obstructions:** Check the strike (the metal piece on the door) and the latch receiver (the housing on the washer frame) for trapped lint, coins, or soap residue that might prevent the latch from fully engaging.
3. **Check Wiring (Requires Access):**
* Unplug the washer again.
* Access the door lock assembly (usually requires removing the washer top panel or the front retainer ring/boot gasket, depending on your model).
* Visually inspect the harness connection to the lock assembly. Look for burnt wires, corrosion, or loose plastic connectors. If the wiring looks damaged, replace the door lock assembly/harness first.
* If the wiring is secure and looks undamaged, the component failure is internal.
### Step 3: The Confirmed Fix – Replacing the Main Control Board
If you have performed the power cycle reset (Step 1) and confirmed the wiring and physical latch are clean and secure (Step 2), the E45 error is almost certainly stemming from a faulty Main Control Board.
**Safety Warning:** Always unplug the machine before attempting to access any internal components.
#### **Location and Replacement:**
1. **Access the Board:** On most Frigidaire models, the Main Control Board (CCU/MCU) is located either:
* Behind the back panel (for top-loading models).
* In the top console, accessible after removing the rear screws and sliding the top lid back (for front-loading models).
2. **Document Wiring:** Before disconnecting anything, take clear photos of all wire harnesses connected to the Main Control Board. This is critical for accurate reassembly.
3. **Remove the Old Board:** Disconnect all wire harnesses (usually involving clips or tabs). Remove the screws or clips holding the old board in its housing.
4. **Install the New Board:** Install the new Main Control Board, ensuring all wire harnesses are connected exactly as they were on the old board.
5. **Reassembly and Test:** Reassemble the washer, plug it in, and attempt to run a short diagnostic cycle. The E45 error should now be resolved.
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## 3. Call to Action
If your troubleshooting steps confirm the failure of the central electronics, you will need to purchase a replacement board specific to your Frigidaire model number.
Check the price for a replacement Main Control Board here: https://www.amazon.com/s?k=Frigidaire+Main Control Board&tag=trivian-20