Johnson & Starley Boiler 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.
Johnson & Starley Boiler Error Images
Listed below are some error Images that could appear on your Johnson & Starley boiler.
| Fault Image | System Behaviour |
|---|---|
 |
Ignition lockout |
 |
High limit error |
 |
No tacho from fan |
 |
High flue gas tempurature |
 |
Flame circuit error |
 |
Valve drive circuit error |
 |
Dual sensor error |
 |
Default lockout |
 |
Remote reset lockout |
 |
ADC error |
 |
CRC error – SW switch |
 |
Flame signal lost 5 times in 4 minutes. |
 |
Boiler flow temp sensor open circuit |
 |
DHW sensor short |
 |
DHW sensor open |
 |
Low mains voltage (Mains) |
 |
Water pressure error |
 |
OpenTherm sensor shorted to earth |
 |
Water pressure too high |
 |
No water pressure signal recievced fom MMI |
 |
Boiler return temp. sensor open circuit |
 |
Flue gas temp sensor short |
 |
Flue gas temp. sensor open circuit |
 |
Communication MMI -CVBC lost |
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 |
