Display shows E15, unit attempts to start but immediately shuts down, sometimes with audible relay clicking

Safety First: Use caution when measuring live voltage. If unsure, contact an electrician or technician.

• Step 1 – Check outlet voltage: Use a multimeter to verify correct voltage at the outlet (typically 115V AC in North America). Low voltage can trigger E15.
• Step 2 – Inspect power cord: Check for damage, burns, or loose fit in the outlet. Replace the cord if any defects are found.
• Step 3 – Try a different circuit: Temporarily plug the unit into a known-good, dedicated circuit (no extension cords) to rule out house wiring issues.
• Step 4 – Inspect control board: With power disconnected, remove the access panel and inspect the control board for burnt components or swollen capacitors.

If line voltage is stable and E15 persists, the internal power supply on the main control board is likely faulty and the board should be replaced by a professional.