The E72 error on your Frigidaire means the main control board has lost communication with the motor control board or another internal module. This is usually an electrical connection issue rather than a broken part, so check your wiring harnesses before assuming you need a replacement board.

Error code E72
Meaning Communication failure between the main control board and the motor control board (or drive motor circuit)
Severity Medium — the dryer will usually stop mid-cycle or fail to start
Time to fix 15–40 minutes
Tools needed Screwdriver, multimeter (optional)

What the E72 error means

Frigidaire dryers use a network of small circuit boards that talk to each other to run the drum, heater, and sensors. The E72 code appears when the main control board sends a signal to the motor control board and doesn’t get the expected response back. It’s the dryer’s way of saying “I can’t confirm the motor is working properly,” even if the motor itself is fine.

In most cases this points to a loose connector, a damaged wire, or a fault on the motor control board itself. It’s similar in nature to communication errors seen on other appliances, such as the Frigidaire EC Error Code on refrigerators, which also flags a break in internal signal flow.

Common causes

  • Loose or corroded wiring connector between the main control board and motor control board
  • A pinched or chafed wire harness caused by vibration during normal use
  • Failed motor control board
  • Faulty main control board
  • Power supply irregularities (voltage spikes or a poor ground connection)
  • Static build-up or moisture affecting the control board contacts

How to fix the E72 error

  1. Power cycle the dryer: Unplug it for 60 seconds, or switch off the breaker, then restart. This clears temporary communication glitches and is worth trying first.
  2. Check the wiring harness: Unplug the dryer, remove the back or top panel, and inspect the wires running between the main control board and motor control board for looseness, corrosion, or damage.
  3. Reseat all connectors: Disconnect and firmly reconnect each plug on both control boards. A connector that isn’t fully seated is one of the most common causes of this error.
  4. Inspect the motor control board: Look for burn marks, bulging capacitors, or a burnt smell. Any of these signs mean the board needs replacing.
  5. Test with a multimeter: If you’re comfortable doing so, check for continuity along the wiring harness between boards to find a hidden break.
  6. Replace the faulty board: If wiring checks out fine, the motor control board or main control board is likely defective and should be replaced with a manufacturer-approved part.

FAQ

Can I keep using the dryer if it shows E72?
It’s best not to. The dryer may stop mid-cycle or not heat properly, and running it repeatedly with a communication fault can stress the motor control board further.

Does E72 always mean I need a new control board?
No. Many cases are resolved by fixing a loose or damaged connector rather than replacing electronics. Always check wiring first.

Is E72 related to similar codes on Frigidaire refrigerators?
The logic is similar — it’s a communication fault — but the components involved differ. Codes like the Frigidaire EF Error Code and Frigidaire CE Error Code affect refrigerator sensors, not dryer motor circuits.