Hi, tigemette. Welcome to JustAnswer.If the answer I provide for you is helpful, please click 'ACCEPT'. I won't be paid if you don't. Thank you.
The problem is with the sensor that detects the loop. I am sorry but this is not a DIY repair.
These units are complicated to say the least. There are not many things that I will not try to repair. The new computerized units are one of them. I know how to, but I wont because they are just too complex.
You will need a service technician to repair this.
Ok I called the local repair shop and asked them your question. A gentleman named Gary said that it could be a sensor, especially since it does the same thing with diffrent loops. He was also very adamant about whether you had followed the instructions in the owners manual "to the letter". He stated that 99% of this type of problem is operator error. The software would be a concern if the latest updates have not been installed but did not think it was a big concern in this case.
Please know that Gary is certified by the manufacturer of your unit.
Please let me know if you have any other concerns in this matter.