Tuscan 2 wavy dash Heater Fan groans

[MackieTVR]

Has anyone had the following symptoms- my heater fan struggles to start, it groans like its stalled and then frees up and runs, it seems to stop and start running in use and the fan speed LEDs on the fan speed control dial/switch flashes on and off in time with the fan stopping and starting?

[MackieTVR]

Thank you for the advice, I will remove the panel and use deoxit on the connections - do you know where I would find the heater ECU?