Back to RC and having an issue!

[WebbersRacing]

Hi everyone, I used to race Touring cars back in the 40Mhz transmitter days and I have come across an issue with my sons FTX Edge.

He hasn't used it for a while and when we went to use it yesterday and we turn the transmitter is switched on, the motor goes straight to full power. This happens when either the transmitter gets switched on first or the receiver/speedo on first.

The car has a simple on/off switch located above the motor and when the battery is connected and switched on, the speedo has a blue light flashing.

I have been told that maybe the transmitter and receiver have lost their bind but Im not too sure how to fix this. The manual that came with the car isn't much help so if anyone is able to shed some light on this then that would be great.

Thanks in advance.
Paul