Measurement:

Please select from the appropriate fault code below:
F75 No pressure change detected on pump start-up
F22 Low water pressure
F73 Water pressure signal in the wrong range (too low)
F74 Water pressure signal in the wrong range (too high)
F85 Sensors incorrectly fitted
F23, F24 Temperature differential incorrect
F83, F84 Temperature change fault
F52, F53 Air mass sensor problem
F28, F29 Ignition or Reignition fault
F72, F83, F84 Temperature differential related fault
F00, F10, F71 Flow sensor related fault
F01, F11, F64 Return sensor related fault
F57, F67, F68 Rectification fault
F77 Condensate pump defective