Tool fan always on on FAN0

[mrjoneskod]

Hi everyone,
I have a Duet2 Wifi 1.03.
I am having a strange part cooler fan behaviour after upgrading RRF 3. It all worked fine on RRF2.X and 1.X no hardware changes.

I re-did the online configurator since some things changed and the BLtouch wasn't working, now everything is working but the tool head fan.
I have the hotend fan is thermostatically controlled and should come on at 45C plugged on FAN1.
The tool fan (FAN0) should work independently but it only turns on at 45C as well (thermostatic control is off), it never turns off even with an M106 S0. But it will come off if the head is below 45C.

This is my config file.

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.2 on Sun Feb 14 2021 15:34:33 GMT-0600 (Central Standard Time)

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"Duet Wifi"                                  ; set printer name

; Network
M552 S1                                        ; enable network
M586 P0 S1                                     ; enable HTTP
M586 P1 S0                                     ; disable FTP
M586 P2 S0                                     ; disable Telnet

; Drives
M569 P0 S0                                     ; physical drive 0 goes backwards
M569 P1 S1                                     ; physical drive 1 goes forwards
M569 P2 S1                                     ; physical drive 2 goes forwards
M569 P3 S0                                     ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E3                               ; set drive mapping
M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E154.30              ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00            ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
M201 X900.00 Y900.00 Z50.00 E250.00            ; set accelerations (mm/s^2)
M906 X1200 Y1200 Z800 E1200 I30                ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                        ; Set idle timeout

; Axis Limits
M208 X-20 Y-8 Z0 S1                               ; set axis minima
M208 X220 Y208 Z200 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"!xstop"                               ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"!ystop"                               ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S1                                         ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"exp.heater3"                             ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000                ; set Z probe type to bltouch and the dive height + speeds

G31 P500 X27.3 Y0 Z0.0                             ; set Z probe trigger value, offset and trigger height
M557 X0:200 Y0:200 S30                             ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138     ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                              ; create bed heater output on bedheat and map it to sensor 0
M307 H0 R0.490 C63.9 D9.77 S1.00 V24.2             ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S110                                       ; set temperature limit for heater 0 to 110C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138      ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 R5.496 C93.6 D2.04 S1.00 V24.3             ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                       ; set temperature limit for heater 1 to 280C
M307 H3 A-1 C-1 D-1                                ; Disable the 7th Heater to free up PWM channel 5 on the Duex board.

; Fans
M950 F0 C"fan0" Q100                               ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 L0 H1                                   ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                               ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 L0 H1 T45                               ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0                                   ; define tool 0
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous

M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
T0                                                 ; select first tool

I can control the fans speeds with the slider in the web GUI if the hotends are above 45C, if the hotend is below 45C the slider control doesn't do anything.

I have looked for answers and read the docs, but I can't seem to find a solution.

Thanks in advance!

[Phaedrux]

@mrjoneskod said in Tool fan always on on FAN0:

; Fans M950 F0 C"fan0" Q100 ; create fan 0 on pin fan0 and set its frequency M106 P0 S0 L0 H1 ; set fan 0 value. Thermostatic control is turned off

Change that H1 to H-1 to disable thermostatic control.

[mrjoneskod]

@Phaedrux So simple, it worked perfectly.

It was probably my mistake, thanks.