Warmflow is a Northern Irish manufacturer producing oil-fired condensing boilers and cylinders. Popular throughout Ireland and rural UK, their boilers are designed for homes without mains gas.
Warmflow Boiler Fault Codes
All Warmflow Fault Codes 20
| Code | Fault | Severity | Type | View guide |
|---|---|---|---|---|
| E1 | Ignition Lockout The burner has failed to ignite after the start sequence. | High | Engineer | View Guide |
| E10 | Fan Fault Fan not operating correctly. | High | Engineer | View Guide |
| E11 | APS Fault Air pressure switch fault. | High | Engineer | View Guide |
| E12 | Condensate Blocked Condensate drain blocked. | Medium | DIY Check | View Guide |
| E13 | Diverter Fault Valve stuck. | Medium | Engineer | View Guide |
| E14 | Gas Valve Fault Gas valve not responding. | High | Engineer | View Guide |
| E15 | Combustion Fault Air/fuel outside limits. | High | Engineer | View Guide |
| E16 | PCB Fault Internal error. | High | Engineer | View Guide |
| E17 | Pressure Sensor Fault Sensor faulty. | Medium | Engineer | View Guide |
| E18 | Rapid Temperature Rise Flow temp rising too fast. | High | Engineer | View Guide |
| E19 | Frost Protection Frost protection running. | Medium | DIY Check | View Guide |
| E2 | Flame Failure The flame has been lost during operation. | High | Engineer | View Guide |
| E20 | Outdoor Sensor Outdoor sensor faulty. | Low | Engineer | View Guide |
| E3 | Overheat Lockout The boiler has exceeded safe temperature. | High | Engineer | View Guide |
| E4 | Low Water Pressure System pressure is too low. | Low | DIY Check | View Guide |
| E5 | Flow Sensor Fault The flow temperature sensor has a fault. | Medium | Engineer | View Guide |
| E6 | Return Sensor Fault The return temperature sensor has a fault. | Medium | Engineer | View Guide |
| E7 | Pump Fault The pump is not operating correctly. | High | Engineer | View Guide |
| E8 | PCB Fault Internal PCB error. | High | Engineer | View Guide |
| E9 | DHW Sensor Fault Hot water sensor faulty. | Medium | Engineer | View Guide |