Rear Screen Heater Button

[avp546]

I think the relay for my heated rear screen has given up the ghost. It is a 2002 C4S and recently the heated rear screen button won't switch off. It doesn't really switch on either and nor does it heat the screen. The light glows a dull orange and only switches off once I've removed the keys from the ignition and locked the car. The other day when I first noticed it I could hear a relay clicking even though I hadn't touched the switch.

Any ideas or advice would be gratefully received! Thank you!

[Loren]

If the side mirrors also do not heat to defog then:

Check Fuse D2 (30 A).

Check relay 4.

If the side mirrors do heat/defog then it is likely a broken heater element in the glass.

[avp546]

Thanks. The relay was showing a bit of water damage. Have cleaned it up and now it's working.