Verified boiler fault code
Sime ALL 99 Fault Code (Brava Slim HE ErP)
General control-board error.
Safety disclaimer
Fault code summary
- Manufacturer
- Sime
- Fault code
- ALL 99
- Fault type
- PCB/electronics, Electrical
- Severity
- high
- Reset
- The official table directs the user to technical assistance; no user reset is confirmed.
- Applicable models
- Brava Slim HE ErP 25, Brava Slim HE ErP 30, Brava Slim HE ErP 35, Brava Slim HE ErP 40
Quick answer
General control-board error.
What does this fault code mean?
General control-board error.
Common causes
- General control-board error
Symptoms
- ALL 99 alarm displayed
What can the homeowner safely check?
- Record the alarm and use only the normal user controls; do not open the casing.
Boiler reset information
The official table directs the user to technical assistance; no user reset is confirmed.
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
- A qualified engineer should diagnose the control board and associated wiring using Sime service information.
Applicable boiler models
Related fault codes
- ALL 01 — Brava Slim HE ErP
Flue-gas thermostat fault.
Read fault code - ALL 02 — Brava Slim HE ErP
Low water pressure in the appliance.
Read fault code - ALL 03 — Brava Slim HE ErP
High water pressure in the heating circuit.
Read fault code - ALL 44 — Brava Slim HE ErP
No-flame gas-valve opening-time sum anomaly.
Read fault code - ALL 56 — Brava Slim HE ErP
Lock for delivery/return temperature difference above the maximum limit.
Read fault code - ALL 57 — Brava Slim HE ErP
Lock for the flow-temperature check (open-vent model).
Read fault code - ALL 62 — Brava Slim HE ErP
Self-calibration procedure required.
Read fault code - ALL 72 — Brava Slim HE ErP
Incorrect positioning of the delivery sensor.
Read fault code
Manufacturer documentation
Brava Slim HE ErP installation, use and maintenance manual (official Sime document 6322841C)Official manual fault table: | ALL | 99 | General board error | - Contact the Technical Assistance Centre |
Last verified
2026-09-12
Frequently asked questions
What does Sime ALL 99 mean?
General control-board error.
Can I reset a Sime ALL 99 fault?
The official table directs the user to technical assistance; no user reset is confirmed.