Ravenheat Combi Boiler Error Codes
Ravenheat Combi Boiler Error Codes

Ravenheat Combi Boiler Error Codes

Ravenheat Combi Boiler Error Codes But though your Ravenheat boiler has served you faithfully, it has recently locked out and it displays a code. You know this code means something, but you don’t know what. To help you diagnose the problem, we have taken time to list common Ravenheat boiler problems and matched them to their fault codes.

Ravenheat Boiler Error Code Solutions

Fault CodesSystem Behaviour 
F73Heating circuit pressure sensor fault
F74Heating circuit pressure sensor fault
F76Thermal fuse fault
F77Fault in gas valve motor
F83No water in the installation – the temperature does not increase when the burner is lit
F84Permanent temperature difference between flow and return heating sensors
F85Flow and return heating sensors fault
F86Underfloor heating contact fault
ERRUser interface fault
04Domestic hot water (DHW) sensor faulty

Ravenheat CSI 120 Boiler Error Codes

Fault CodeSystem Behaviour
17Possible issue with fan voltage
01Boiler failed to ignite – problem with gas valve operation, fan failing to start, ignition control board and cable
28Failed low water – pressure switch or pump, possible issue with pump, incorrect system pressure, or the low water switch pressure needs replacing
12Failed heating sensor – issue with heating sensor and could need replacing
04Failed overheat – the overheat thermostat needs checking
30Failed flue temperature – check the operating system
31Failed flue temperature – the flue sensor needs checking or replacing
02Failed temperature – try resetting the boiler

Ravenheat CS 80/90, WH System, WH 80/90 Boiler Error Codes

Fault CodeSystem Behaviour
E02Problem with the pump circulation
E03Flow sensor damaged
E04Domestic hot water (DHW) sensor damaged
E05Problem with fan – possibly no signal
E06Central heating (CH) sensor is overheating
E08Low water pressure
E09Overheat sensor overheating
E10High water pressure
E13Software error
E21Central heating (CH) return sensor overheating
E22Flue sensor overheating
E23Flue sensor damaged
E24Central heating return sensor error – possibly damaged
E25Main heat exchanger frozen
E29Domestic hot water (DHW) sensor overheating error
E31OpenTherm communication error
E41Different flow/return temperatures
E42Different temperature error
E43Different temperature error
E44Different temperature error
E46Water pressure sensor error – could be open or short

Ravenheat HE 80/90 HE 25-30s, HE 80-98s, HE 8-98s or HE 25-30s Compact Error Codes

Fault CodeSystem Behaviour
02EProblem with the pump circulation
03EFlow sensor damaged
04EDomestic hot water (DHW) sensor damaged
05EProblem with fan, possibly no signal
06ECentral heating sensor is overheating
08ELow water pressure
09EOverheat sensor overheating
10EHigh water pressure error
13ESoftware error
21ECentral heating return sensor overheating
22EFlue sensor overheating
23EFlue sensor damaged
24ECentral heating return sensor error, possibly damaged
25EMain heat exchanger frozen
29ED.H/W sensor overheating error
31EOpenTherm (OT) communication error
41EDifferent temperature between flow and return
42EDifferent temperature error
43EDifferent temperature error
44EDifferent temperature error
46EWater pressure sensor error -could be open or short

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