The E43 error on your Frigidaire dryer means the main control board has lost communication with another board in the dryer, usually the motor control board or the user interface (touch panel) board. Fixing it usually starts with checking the wiring connections between these boards before replacing any parts.

Error code E43
Meaning Communication failure between the main control board and the motor control board or user interface board
Severity Medium — the dryer usually stops running or won’t start until this is resolved
Time to fix 15–45 minutes
Tools needed Screwdriver, multimeter (optional, for testing wiring)

What the E43 error means

Frigidaire dryers use multiple circuit boards that talk to each other through wiring harnesses — usually a main control board, a motor control board, and a user interface board with the display and buttons. The E43 code appears when one of these boards stops sending or receiving signals correctly, which the system reads as a communication breakdown rather than a specific part failure.

This is different from a heating or sensor error because it doesn’t point to a single failed component. Instead, it tells you two boards aren’t “talking,” which could be caused by a loose connector, damaged wire, or a board that has actually failed.

Common causes

  • Loose or partially disconnected wiring harness between the control board and motor control board
  • Corroded or damaged connector pins from heat or moisture exposure
  • A failed or failing main control board
  • A failed or failing motor control board
  • Damaged wiring harness from wear, pinching, or rodent damage
  • Power surge or electrical spike that disrupted board communication temporarily

How to fix the E43 error

  1. Power cycle the dryer: Unplug the dryer for 60 seconds, then plug it back in. This clears temporary glitches and resets the communication between boards, which fixes the issue in many cases.
  2. Check the wiring harness connections: Unplug the dryer, remove the rear or top panel (check your model’s manual for access), and locate the main control board and motor control board. Inspect the connectors for looseness, corrosion, or damage, and reseat them firmly.
  3. Inspect wires for physical damage: Follow the wiring harness between the boards and look for pinched, frayed, or burnt wires. Replace any damaged sections or the whole harness if needed.
  4. Test continuity with a multimeter: If you’re comfortable with basic electrical testing, check the wiring harness for continuity between the boards to confirm the wires themselves aren’t broken internally.
  5. Replace the motor control board: If wiring checks out fine, the motor control board is a common failure point for this error. Order the correct part for your model number and swap it in.
  6. Replace the main control board: If the error persists after replacing the motor control board and wiring, the main control board itself may need replacing — this is less common but does happen.

FAQ

Can I still use my dryer if it shows an E43 error?
It depends on the model — some dryers will stop mid-cycle or refuse to start at all, while others may run intermittently. It’s best to address the error promptly rather than relying on the dryer while it’s faulty.

Will unplugging the dryer reset the E43 error permanently?
Sometimes, but not always. If the cause is a genuine wiring or board fault, the error will come back after a power cycle. If it doesn’t return, it was likely a one-off electrical glitch.

Do I need a technician to fix this, or can I do it myself?
Checking and reseating wiring connections is a manageable DIY task for most homeowners. Replacing control boards is also doable yourself if you’re comfortable working with appliance wiring, but a technician can help if you’re unsure or the error persists after basic checks.