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.
Johnson & Starley Boiler Error Images
| 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
| 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 |
- View the Boiler Guide home of Johnson and Starley
- See the common problems and get repair advice for your Johnson and Starley boiler
