GAS SAFE REGISTERED
CUSTOMER FOCUSSED
QUALITY DRIVEN

Ideal Boiler Fault Codes Starting With F

We have listed below some of the more common Ideal Boiler Fault Codes beginning with F

FD – No water flow
This is likely to be caused by a lack of water in your system or no flow
Check your header tank in your loft (if you have one) to see if you have water in it. If you do then call us to come and investigate and provide a fixed fee boiler repair quote
F1 – Low water pressure
The most likely cause is low water pressure in your system.

Top up your water pressure using the boilers filling loop or the filling loop located in your property

F2 – Flame loss
This is caused by a variety of issues including no gas, poor gas pressure, or a component has failed
Check any gas appliances in your property to make sure you have gas, if you do then call us or email us to investigate the cause and provide a fixed fee boiler repair quote
F3 – Fan Fault
This is caused by a faulty fan, but can also be an indication of a more serious underlying problem. For example a leak onto the fan, damaged or corroded leads or a failed PCB
If you are in the Leighton Buzzard, Bletchley, Milton Keynes, Aylesbury or Dunstable area, give us a call to investigate 07584 373876 or email us
F4 – Thermistor Fault
This is caused by a faulty flow thermistor, but can also be an indication of a more serious problem. For example a leak onto the leads or a failed PCB
This fault requires a Gas Safe registered engineer to investigate, give us a call on 07584 373876
F5 – Return Thermistor Fault
This is often caused by a faulty return thermistor, but can also be caused by a flow problem or a faulty PCB
For this fault you will need a Gas Safe registered engineer, give us a call to investigate 07584 373876
F6 – Outdoor Sensor Fault
This indicates you have a faulty or broken outdoor sensor or a faulty PCB
For this fault you will need a Gas Safe registered engineer, give us a call to investigate 07584 373876
F7 – Low Mains Voltage
If this fault occurs your property may have developed a mains electric fault. It could also have a loose or faulty connection within the boiler.
For this fault you will need a Gas Safe registered engineer, give us a call to investigate 07584 373876
F9 – Printed Circuit Board Fault
This indicates your PCB has failed or has been installed incorrectly.
For this fault you will need a Gas Safe registered engineer, give us a call to investigate 07584 373876

Ideal Boiler Fault Codes Starting With L

We have listed below some of the more common Ideal Boiler Fault Codes beginning with L

L1 – Poor Water Flow
Your boiler takes temperature readings and if it is too low or too high, it shuts down as a safety precaution
Try resetting your boiler and if this doesn’t help, then give us a call to investigate on 07584 373876
L2 – Ignition Lockout
Your boiler has “locked out” as a safety precaution and the cause needs investigation
If you have a rumbling sound coming from your boiler it could be a blocked flue or condensate. Both will require a Gas Safe engineer to investigate and rectify
L3 – No Flow Thermistor Fault
This normally indicates someone has changed the PCB and failed to calibrate it correctly
It is recommended that you call us to investigate on 07584 373876
L3 – No Flow Thermistor Fault
This normally indicates someone has changed the PCB and failed to calibrate it correctly
It is recommended that you call us to investigate on 07584 373876
L9/H9/HA/LA – Overheating
Similar to L1, this indicates that your resistances are too high
Check your system pressure after bleeding your radiators. If this does not fix your problem then we recommend you ring us
LF – Ignition Fault
The cause of this fault is very hard to identify, even for a Gas Safe engineer.
You should call us to investigate on 07584 373876, alternatively you may wish to consider a new boiler
L5 – Boiler Return Issue
Indicates the boiler has been reset 5 times or more within 15 minutes

Turn the power off to the boiler then back on again after 10 seconds, if the problem persists contact us for a fixed price boiler repair – 07584 373876

L6 – Flame Detection Fault
Indicates the boiler has been reset 5 times or more within 15 minutes

Turn the power off to the boiler then back on again after 10 seconds, if the problem persists contact us for a fixed price boiler repair – 07584 373876