WHAT IS F12 IN A WASHING MASHINE ARISTON AQUALTIS AQXXF 129 H?HOW CAN I FIX IT?

Contact the manufacturer.

It means "heater relay cannot be activated". Troubleshooting guide says to tap the relays to try to unjam them. If that fails, replacement of the main control board is necessary. These washers apparently have a propensity for stuck relays on the newer units.

inner and outer drum has to b removed replace the bearing kit 2 bearings one oil seal as kit

F11: Pump Feedback Missing
Overhaul CN1
Overhaul CNF
Overhaul Pump Connector
Overhaul Pressure Switch Connector
Control Pump Windings
Replace Pump
Replace Card

Dado

F13: NTC wiring harness disconnected from the dryer system
1. Check the efficiency of the terminals on the CNA connector board
2. Check NTC wiring harness
3. Check the wiring harness continuity of the CNA / NTC connectors
4. Replace NTC
5. Replace terminal board

Dado

F08 - Heater relay cannot be activated

• Check wiring
• Check pressure switch and connections
  
• Tap relays as they can jam on new boards
• Check electronic control PCB
• Check heating element

Dado

my aqualtis aqgd 169 s washer says washer can not fill but water in it?

see this causes and fix it. God bless you
F05 Water temperature sensor error If during the water heating step in the wash cycle, the water temperature sensor (NTC) value is out of range, or the heating element circuit has failed, the F05 error code will be displayed.

Potential Causes

• Check the Water Temperature Sensor, Heating Element and Element Relay
• Check connections to the Sensor, Heating Element and Relay

Replace failed component.

F-05 means service switch jammed.

Hope this helps. =)

Might be a bit complex but this is your problem and solution

REMEMBER TURN THE POWER OFF

F07: Heater relay stuck or element open circuit
This fault is only signalled when pressure switch is in empty position.
Check the efficiency of edge connector J3 on module.
Check wiring to heater and continuity of element (25 ohms approximately).
Check the efficiency of pressure switch connections and correct operation of pressure switch,
and the pressure chamber is not blocked with sludge.
Remove edge connector J3 and check wiring and contacts at positions 2, 3 and 4 on J3.
If all above OK replace pressure switch, module or eeprom as required.