TX2020 Overheating

Hi All,
Anyone else having overheating with the TX2020? Since we upgraded from the CMM4 our TX2020 has been overheating and requires site personnel to attend and flick the circuit breaker.
To be fair this device is in a steel cabinet in Northern Australia however we never had any issues with the CMM4 and do not have any issues with the Cisco Industrial switch in this cabinet.