Verified boiler fault code
Main Heating E119 Fault Code (Eco Elite System)
Water-pressure switch not operated; the manual states this is shown below 0.5 bar primary-water pressure.
Safety disclaimer
Fault code summary
- Manufacturer
- Main Heating
- Fault code
- E119
- Fault type
- Low pressure, Pressure sensor
- Severity
- Not specified
- Reset
- Not specified
- Applicable models
- Main Eco Elite 24 System ErP, Main Eco Elite 28 System ErP
Quick answer
Water-pressure switch not operated; the manual states this is shown below 0.5 bar primary-water pressure.
What does this fault code mean?
Water-pressure switch not operated; the manual states this is shown below 0.5 bar primary-water pressure.
Common causes
- Primary water pressure below 0.5 bar.
- Water-pressure switch not operated.
Symptoms
- The facia displays E119 and the boiler may stop.
What can the homeowner safely check?
- Read the pressure gauge without removing the casing.
Boiler reset information
Reset information was not provided in the verified manufacturer source. Do not repeatedly reset an unresolved fault.
When should I call an engineer?
Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.
Engineer diagnosis
- Check system pressure, pressure switch operation and possible water loss.
Applicable boiler models
Related fault codes
- E110 — Eco Elite System
Safety thermostat operated.
Read fault code - E125 — Eco Elite System
Circulation fault in the primary circuit.
Read fault code - E131 — Eco Elite System
Interruption of power supply while in fault mode.
Read fault code - E133 — Eco Elite System
Interruption of gas supply or flame failure.
Read fault code - E160 — Eco Elite System
Fan or fan-wiring fault.
Read fault code - E20 — Eco Elite System
Central-heating NTC fault.
Read fault code - E28 — Eco Elite System
Incorrect PCB fitted.
Read fault code - E50 — Eco Elite System
Hot-water NTC fault.
Read fault code
Manufacturer documentation
Main Eco Elite System Installation & Service ManualE119 is displayed when the primary water pressure is less than 0.5 bar.
Last verified
2026-09-12
Frequently asked questions
What does Main Heating E119 mean?
Water-pressure switch not operated; the manual states this is shown below 0.5 bar primary-water pressure.