The E70 error on your Frigidaire dryer means the main control board has lost communication with the motor control board. This usually points to a wiring or connector issue rather than a failed part, so check the connections before replacing anything.

Error code E70
Meaning Communication failure between the main control board and the motor control board
Severity Medium — the dryer will usually stop mid-cycle and won’t restart until fixed
Time to fix 15–40 minutes
Tools needed Nut driver or screwdriver, multimeter (optional)

What the E70 error means

Frigidaire dryers use two boards that talk to each other: the main control board (where you set cycles) and the motor control board (which drives the drum motor). When these two boards stop communicating properly, the dryer displays E70 and shuts down the cycle as a safety measure.

This is not usually a sign of a burnt-out motor. In most cases it’s a loose wire, a damaged connector, or a harness that has been pinched or vibrated loose over time.

Common causes

  • Loose or disconnected wiring harness between the main control board and motor control board
  • Corroded, bent, or dirty connector pins
  • A wire pinched during a previous repair or panel removal
  • Failed or faulty motor control board
  • Failed main control board (less common)
  • Power surge that disrupted board communication temporarily

How to fix the E70 error

  1. Power down and unplug the dryer. Always disconnect power before opening any panel to avoid electric shock.
  2. Access the control board. Remove the top or rear panel (depending on your model) to reach the main control board and the wiring that runs to the motor control board.
  3. Inspect and reseat connectors. Unplug and replug each connector along the harness between the two boards, checking for bent pins, corrosion, or looseness.
  4. Check the wiring harness for damage. Look for pinched, frayed, or melted sections of wire, especially near moving parts or panel edges.
  5. Test continuity with a multimeter. If you’re comfortable doing so, check the harness wires for continuity to rule out an internal break.
  6. Reset and test. Plug the dryer back in, run a short test cycle, and watch for the E70 code returning. If it persists after checking wiring, the motor control board likely needs replacing.

FAQ

Can I keep using the dryer if it shows E70?
No. Once E70 appears, the dryer stops the cycle and won’t restart reliably until the communication fault is resolved.

Will unplugging the dryer clear the E70 code?
Unplugging it for a minute may reset the display, but if the underlying wiring or board issue isn’t fixed, the code will return on the next cycle.

Is this the same type of issue as fridge communication errors?
It’s a similar concept — many Frigidaire appliances use multiple boards that communicate, similar to the Frigidaire EF Error Code: Causes and Fixes or the Frigidaire EC Error Code: Causes and Fixes, where a lost signal between components triggers a fault code rather than a single part failure.