F.10 Meaning
This fault according to Vaillant Instructions and Servicing manual is a Heating Flow NTC Thermistor Fault or Heating Flow NTC short circuit
Cause of F10
- There Is A Short Circuit On The Heating Flow NTC Thermistor (Should Read 12Kohms @ 20C)
- Wiring Harness Fault Or Connection Error Between The Heating Flow NTC Thermistor And The Main PCB.
Solutions to repair this fault
Check the NTC sensor. Check the wiring using a continuity tester and resistance tester if necessary. Replace NTC, harness or PCB as necessary dependent on checks.
Models applicable to:
Ecotec Pro, Ecotec Plus, Ecotec Exclusive.