Baxi Bahama 80e / 105e Fault codes & diagnostics

Parts commonly replaced

• Fan Assembly
• Air Pressure Switch
• PCB (Control Board)

Related codes

• Neon flashing (Overheat)

What to check first

1. Check that your radiator valves are open and not turned to off
2. Turn the selector switch to the 'R' (Reset) position for five seconds, then turn it back to your desired setting
3. Ensure there is enough water pressure in the system by checking the pressure gauge

Parts commonly replaced

• Overheat Thermostat
• Water Circulation Pump
• Temperature Sensor (NTC)

What to check first

1. Check if other gas appliances in your home (like a hob) are working to ensure gas is reaching the property.
2. Ensure your prepaid gas meter has credit if applicable.
3. Turn the selector switch to the 'R' (Reset) position for at least 5 seconds, then release it back to the 'On' position.

Parts commonly replaced

• Ignition Electrode
• Gas Valve
• Ignition Lead
• Spark Generator

Related codes

• Neon Flashing (Overheat)

What to check first

1. Check if other gas appliances in your home, such as a hob, are working to ensure gas supply exists
2. Check if your gas meter has credit if you use a pre-payment system
3. Press the reset button once to see if the boiler restarts

Parts commonly replaced

• Ignition Electrode
• Flame Sensing Probe
• Gas Valve
• Printed Circuit Board (PCB)

What to check first

1. Allow the boiler to cool down completely for 30 minutes
2. Check that your radiator valves are open and not blocked by furniture
3. Locate the reset button on the control panel and press it firmly

Parts commonly replaced

• Overheat Thermostat (Limit Stat)
• Circulating Pump
• Thermistor (NTC Sensor)

Parts commonly replaced

• Fan motor
• Air pressure switch
• Venturi tube

What to check first

1. Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.
2. If the pressure is too low, use the filling loop underneath the boiler to carefully top it up.
3. Ensure all radiator valves are open and that the pump has not become stuck after a long period of inactivity.

Parts commonly replaced

• Central heating pump
• Water pressure switch
• Expansion vessel

Related codes

• 25

Parts commonly replaced

• Central Heating Temperature Sensor (NTC)
• Connecting wiring harness

What to check first

1. Check the flue terminal outside your property to ensure it is not blocked by debris, leaves, or snow.
2. Inspect the terminal mesh for any bird nests or physical obstructions.
3. Restart the boiler using the selector switch to see if the fault clears.

Parts commonly replaced

• Air Pressure Switch
• Fan Assembly
• Venturi Tube

What to check first

1. Check that your gas emergency control valve is open and you have credit on your gas meter
2. Press and hold the 'Reset' button (adjacent to the red neon light) for several seconds
3. Ensure there are no obstructions around the external flue pipe outside your home

Parts commonly replaced

• Ignition electrode
• Flame sensing probe
• Gas valve
• Printed Circuit Board (PCB)

What to check first

1. Locate the pressure gauge on the front of the boiler
2. Find the filling loop (usually silver flexible hoses underneath the boiler)
3. Slowly open the valves until the pressure gauge reaches between 1.0 and 1.5 bar, then close them tightly

Parts commonly replaced

• Circulating Pump
• Low Pressure Switch
• Expansion Vessel Re-pressurisation

What to check first

1. Check that your radiator valves are open to allow water to flow.
2. Check the central heating pressure gauge is between 1 and 1.5 bar; top up if low.
3. Turn the selector switch to the reset position for five seconds, then back to the desired setting.

Parts commonly replaced

• Safety Thermostat (Limit Statutory)
• Water Circulation Pump
• Primary Heat Exchanger