Vaillant Combi Compact 282EB Fault codes & diagnostics

7 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 24 kW 1994-2002 Discontinued

Replaced by: Turbomax

Download the Vaillant Combi Compact 282EB manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Severity at a glance

Each cell = one fault code. Hover to identify.
5 High 1 Medium 1 Low
Just want the most common Vaillant Combi Compact 282EB faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 7 documented codes

Tap any card for details

CONNECTION

Your boiler's internal components are failing to talk to each other, meaning the system cannot start up to provide heat or hot water.

High Engineer only £180-450

Parts commonly replaced

  • Main PCB (Printed Circuit Board)
  • Wiring Harness
  • Display PCB

Related codes

Full explanation for CONNECTION
S.1

Your boiler is unable to start the heating process because its internal fan, which safely clears waste gases, is failing to spin up properly.

High Engineer only £180-450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Air pressure switch

Related codes

Full explanation for S.1
S.2

Your boiler has stopped heating up because the water is not being pumped through the system properly.

High DIY-safe £180-350

What to check first

  1. Check that the boiler pressure is between 1.0 and 1.5 bar
  2. Ensure all radiator valves and the boiler's service valves are fully open
  3. Gently bleed air from your radiators using a radiator key

Parts commonly replaced

  • Circulation pump
  • Automatic air vent
  • Pump capacitor

Related codes

Full explanation for S.2
S.3

Your boiler is struggling to start the burner to provide heating, which means your radiators will not warm up.

High DIY-safe £120-350

What to check first

  1. Check that your gas pre-pay meter has credit
  2. Ensure the gas stop tap is fully open
  3. Press the Reset button (indicated by a flame with a cross through it) and hold for 2 seconds

Parts commonly replaced

  • Ignition Electrode
  • Flame Sense Electrode
  • Gas Valve
  • Ignition Lead

Related codes

Full explanation for S.3
S.6

Your boiler is failing to settle down correctly after heating your home because the internal fan is running for longer than the system expects.

High Engineer only £120-450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Air pressure switch

Related codes

Full explanation for S.6
S.7

Your boiler is temporarily finishing its heating cycle by running the pump to cool down, but it has detected that this process isn't working quite as expected.

Medium DIY-safe £100-250

What to check first

  1. Check that at least one radiator (usually the one in the room with the thermostat) has its valves fully open
  2. Ensure the system pressure is between 1.0 and 1.5 bar on the pressure gauge
  3. Press the reset button once to see if the status clears

Parts commonly replaced

  • Circulation Pump
  • Pump Overrun Thermostat
  • Main PCB

Related codes

Full explanation for S.7
S.8

Your boiler is temporarily in a waiting period to prevent it from cycling on and off too frequently after reaching its target temperature.

Low DIY-safe

What to check first

  1. Wait approximately 5 to 10 minutes for the countdown to end
  2. Check that your room thermostat is turned up higher than the current room temperature
  3. Ensure all radiator valves are fully open to allow heat to dissipate

Related codes

Full explanation for S.8
Status & diagnostic codes

7 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

10 Diagnostic Your boiler has detected an electrical connection issue with the reset button, meaning it has shut itself down as a safety precaution. 11 Diagnostic Your boiler has detected a fault with the ignition process and has shut down for safety reasons to prevent gas from flowing without a flame. 12 Diagnostic Your boiler is struggling to detect a stable electrical connection, which is causing it to shut down for safety. 13 Diagnostic Your boiler is failing to light because it cannot detect a steady pilot flame, meaning you currently have no heating or hot water. 14 Diagnostic Your boiler's water pump is failing to communicate correctly with the main control board, meaning the system cannot circulate hot water around your radiators or taps. S.15 Status Your boiler is briefly keeping the pump and fan running to cool itself down after you have finished using the hot water. S.O Status Your boiler is currently idle because it has not received a signal from your thermostat or timer to turn the heating on.