Miele Dishwasher Error Code F45: How to Fix Resin Regeneration Fault

Q: What does error F45 mean on a Miele dishwasher?

F45 indicates a resin regeneration fault in the built-in water softener. It usually means insufficient salt or a blockage in the regeneration system.

Q: How do I reset error F45 on my Miele dishwasher?

Refill the salt reservoir with dishwasher salt, then run a rinse cycle. The error should clear automatically. If not, try resetting by turning the power off for 30 seconds and then back on.

Q: Can I use regular salt instead of dishwasher salt?

No. Regular table salt contains anti-caking agents and other additives that can damage the water softener. Only use coarse dishwasher salt.

Q: Why does my Miele dishwasher keep showing F45 even after refilling salt?

The salt level sensor may be dirty or faulty. Clean the sensor or replace it. Alternatively, the regeneration valve may be blocked, requiring cleaning or replacement.

Q: Is error F45 covered under warranty?

If your dishwasher is still under warranty (typically 2 years from purchase), Miele should cover repair costs. Contact Miele for assistance.

Abstract

Error F45 on your Miele dishwasher indicates a resin regeneration fault. This means the dishwasher's built-in water softener isn't regenerating properly, often due to low salt levels or a blocked regeneration valve. Without a fix, your dishes may develop spots or a white film. Here's how to troubleshoot and resolve it.