2nd thermistor at -15c?

Update: Looks like dodgy thermistors, something wrong with the connection at the black shrink wrap near the head end.

Now that the guides/firmware are up for this I've given a bash at getting it going, but after going through the firmware install/setup the 2nd hothead is allegedly at -15 degrees on the touchscreen.

I've:

- Re-uploaded the Proforge 2s Dual firmware with fresh download

- Verified I chose the Mega2560 board/CPU

- Tested both thermistors which at the time both read 130.2kohm IIRC

- Reseated the thermistor connections

I've checked in the serial console and it sees the -15c too, so it's not a arduino -> lcd issue.

echo:Marlin 1.1.9

echo: Last Updated: 2018-08-01 | Author: (Makertech 3D)

echo:Compiled: Apr 12 2019

echo: Free Memory: 5185 PlannerBufferBytes: 1232

echo:Hardcoded Default Settings Loaded

echo: G21 ; (mm)

echo:Filament settings: Disabled

echo: M200 D1.75

echo: M200 T1 D1.75

echo: M200 D0

echo:Steps per unit:

echo: M92 X80.00 Y80.00 Z400.00 E98.00

echo:Maximum feedrates (units/s):

echo: M203 X300.00 Y300.00 Z5.00 E50.00

echo:Maximum Acceleration (units/s2):

echo: M201 X1000 Y2000 Z100 E10000

echo:Acceleration (units/s2): P<print_accel> R<retract_accel> T<travel_accel>

echo: M204 P2000.00 R5000.00 T2000.00

echo:Advanced: Q<min_segment_time_us> S<min_feedrate> T<min_travel_feedrate> X<max_x_jerk> Y<max_y_jerk> Z<max_z_jerk> E<max_e_jerk>

echo: M205 Q20000 S0.00 T0.00 X3.00 Y3.00 Z0.30 E10.00

echo:Home offset:

echo: M206 X0.00 Y0.00 Z0.00

echo:Hotend offsets:

echo: M218 T1 X0.00 Y-19.00 Z0.00

echo:Auto Bed Leveling:

echo: M420 S0 Z0.00

echo:PID settings:

echo: M301 P18.48 I1.13 D75.30

echo:Z-Probe Offset (mm):

echo: M851 Z-3.00

ok T:22.97 /0.00 B:22.50 /0.00 T0:22.97 /0.00 T1:-15.00 /0.00 @:0 B@:0 @0:0 @1:0

I've had a look in Configuration.h and it all looks good so I'm somewhat stumped.

Any ideas?