Johnson & Starley Boiler Error Codes

Johnson & Starley Boiler Error Codes

Johnson and Starley Error Codes

The Johnson & Starley range of powerful boilers are normally extremely reliable.


Occasionally some things can go wrong, that’s why we’ve created our handy at-a-glance table of Johnson and Starley error codes below and our guide to Common Johnson & Starley Boiler Problems and Repair Advice.

Should you need professional help with your broken boiler, then simply use one of our enquiry forms and we will connect you with the best heating engineers local to you.


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Johnson & Starley Boiler Error Images

Listed below are some error Images that could appear on your Johnson & Starley boiler.

Fault Image System Behaviour
one black spot
Ignition lockout
Two black spots
High limit error
Two spots
No tacho from fan
Three spots
High flue gas tempurature
Three spots
Flame circuit error
Three spots
Valve drive circuit error
Three spots
Dual sensor error
Three spots
Default lockout
Three spots
Remote reset lockout
Three spots
ADC error
Three spots
CRC error – SW switch
Three spots
Flame signal lost 5 times in 4 minutes.
Three spots
Boiler flow temp sensor open circuit
Three spots
DHW sensor short
Three spots
DHW sensor open
Three spots
Low mains voltage (Mains)
Three spots
Water pressure error
Three spots
OpenTherm sensor shorted to earth
Three spots
Water pressure too high
Three spots
No water pressure signal recievced fom MMI
Three spots
Boiler return temp. sensor open circuit
Three spots
Flue gas temp sensor short
Three spots
Flue gas temp. sensor open circuit
Three spots
Communication MMI -CVBC lost
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Johnson & Starley Boiler Error Codes

Listed below are some error codes that could appear on your Johnson & Starley boiler.

Fault Code / Fault Image System Behaviour
1 Flame lockout after several attempts
2 False flame
3 High water temp limit
5 No tacho from fan
8 Flame circuit error
9 Valve driver circuit error
11 Flow/return sensor calibration error
12 Default lockout
13 Elapsed the number of retrials
21 ADC error
26 Flame signal lost 5 times in 4 minutes
31 CH supply sensor error (open or short)
44 CH rerturn sensor error (open or short)
7 High flue gas tempurature
25 CRC error
30 boiler flow temprature sensor short circuit
31 boiler flow temperature sensor open ciruit
32 DHW temperature sensor short circuit
33 DHW temperature sensor open circuit
34 low mains supply voltage
37 low system water pressure
40 high system water pressure
41 No water pressure signal recievced fom MMI
45 flue gas temperature sensor short circuit
46 flue gas temperature sensor open circut
47 watter pressure sensor open circuit
99 Communication MMI -ESYS lost
E01 Ignition lockout
E02 False flame lockout
E03 Overheat lockout
E05 fan fault
E08 Flame circuit failure
E09 Valve feed back ERROR
E12 EEPROM lockout
E15 Sensor drift lockout
E16, E17, E18 Sensor stuck lockout
E21 ADC lockout
E33 Return thermistor fault
E34 Low power supply lockout
E35 Flow thermistor fault
F07 Exhaust sensor fault
F13 Remote reset lockout
F37 Low water pressure
F40 Water pressure too high
F47 Water pressure sensor not connected
F52 DHW sensor fault
F53 Flue temperature sensor lockout
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