⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: H4 / B4 Difficulty: Easy
Problem: Incorrect wiring.
How to Fix H4 / B4 Error (Step-by-Step)
- Unplug the dryer from the wall outlet to ensure your safety.
- Move the dryer away from the wall to access the back panel.
- Locate the terminal block cover, which is a small plate where the power cord enters the dryer.
- Remove the screw holding the terminal block cover in place and set it aside.
- Visually inspect the three wires connected to the terminal block. Ensure each wire is securely fastened under its respective screw and that there are no loose strands of wire touching other terminals.
- If a wire is loose, use a Phillips head screwdriver or a nut driver to tighten the screw until the wire is secure.
- Replace the terminal block cover and screw, plug the dryer back in, and attempt to start a cycle.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
Most DIY parts are $50–$250. If you have a quote, use the total.
More options (for a better recommendation)
⚡ Don’t Risk a DIY Fail!
Get the ‘Secret Service Mode’ Cheat Sheet for your Electrolux model. Includes an easy-to-read list of every error code and quick diagnostic tips.
✅ Join 15,000+ DIYers • Instant PDF Download
Browse More Codes
📖 View All Error Codes
Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Electrolux error codes: Electrolux Error Codes
Leave a Reply