How can I tell how long my heaters and fans have run?

You can easily see data on heater and fan runtime in the OPI Blue platform.

To see this data, navigate to the "Bin Data" and then the "Charts" section of the OPI Blue platform.

Then, at the bottom of this screen, you will be able to see historical values for your cables, fans, heaters and other data points.  This can also be filtered by time period as well.