Easy fix fan/temp OS6 issues on x86 legacy #no support

Hi, I'd appreciate some help here. I have an Ultra 6 which is running 6.0.8
I've been through the fan control settings but the fan is still running at max speed.
I think the problem is that i'm getting null results for all the temp readings.
if i run the SENSORS command i get the following.

root@NASBACK6:~# sensors
coretemp-isa-0000
Adapter: ISA adapter
Core 0: N/A (high = +80.0°C, crit = +100.0°C)
Core 1: N/A (high = +80.0°C, crit = +100.0°C)

it8721-isa-0a10
Adapter: ISA adapter
in0: +12.19 V (min = +11.86 V, max = +9.89 V) ALARM
in1: +5.02 V (min = +4.82 V, max = +5.12 V)
in2: +3.32 V (min = +4.97 V, max = +2.35 V) ALARM
in3: +0.00 V (min = +0.00 V, max = +0.00 V) ALARM
in4: +1.15 V (min = +2.83 V, max = +1.45 V) ALARM
in5: +1.79 V (min = +2.57 V, max = +2.89 V) ALARM
in6: -12.10 V (min = +6.37 V, max = +2.04 V) ALARM
in7: +3.29 V (min = +3.05 V, max = +1.32 V) ALARM
in8: +3.36 V
fan1: 0 RPM (min = 31 RPM) ALARM
fan2: 0 RPM (min = 12 RPM) ALARM
fan3: 2242 RPM (min = 28 RPM)
temp1: +0.0°C (low = -28.0°C, high = -11.0°C) ALARM sensor = thermistor
temp2: +0.0°C (low = +19.0°C, high = -75.0°C) ALARM sensor = thermal diode
temp3: +0.0°C (low = +84.0°C, high = +115.0°C) sensor = thermal diode
cpu0_vid: +2.050 V

The fan previously ran fine under 4.X.X.

Anyone have any ideas about what the problem here might be?

many thanks
Steve