Richard WeedonFeb 28, 20211 minVaillant Fault Code F.23F.23 Safety switch-off: Temp.spread too large: Pump blocked, insufficient pump output, air in product, flow and return NTC connected the...
Richard WeedonFeb 28, 20211 minVaillant Fault Code F.22F.22 Safety switch-off: Low water pressure: No or insufficient water in the product, water pressure sensor defective
Richard WeedonFeb 28, 20211 minVaillant Fault Code F.20F.20 Safety switch-off: Temperature limiter: Incorrect earth connection between cable harness and product, flow or return NTC defective...
Richard WeedonFeb 28, 20211 minVaillant Fault Code F.02F.02 Interruption: DHW outlet sensor: Only in conjunction with F.91NTC defective, NTC cable defective, defective plug connection on NTC,...