Hi, I am new to the forum but have an issue with my Aux Heater on my 2011 Audi A7. the Aux heater is working fine from the MMI but the remote key does not work, and when I switch it on it gives this sign:

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I did a scan for the 18. Aux heater and have this:

1 Fault Found:
01225 - Radio Receiver for Aux Heat (R64)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 7
Fault Frequency: 1
Reset counter: 13
Mileage: 230111 km
Time Indication: 0
Date: 2021.02.15

Appreciate your support/thoughts on this.

Thanks!!