Modern Ideal combi boilers have an outstanding reputation for quality and reliability, with lengthy warranties to match but occasionally, there can be faults and errors. Here's a bit of help with 2018 fault codes.
Before you go calling out an engineer or looking into replace the boiler, first consider two things:
Ideal boilers come with excellent warranties, often up to 10-years if it's been installed by an installer approved by the manufacturer. Dig out your paperwork or scan through your emails to find out how long the warranty you recieved with the boiler was valid for. There's a good chance you'll be covered, in which case you should contact Ideal directly and they'll send out an engineer to solve the issue asap.
Remember that you will likely have had to keep up your annual boiler service appointments to uphold the warranty - your boiler warranty paperwork will detail this.
All of the below mentioned fault codes are issues with the boiler unit itself, so if you are covered under warranty, it was installed by a Gas Safe heating engineer and you've kept up with your annual service appointments, then don't worry about the cost - Ideal will have you covered.
If you're convinced your boiler is busted then compare quotes for a new one below.
Turning it off and on again really can work. Sometimes your boiler will display fault codes in error and in turn, tell its on-board computer not to allow the boiler to function for safety. If this is the case then it can very often be solved with a simple reset.
Here's how to reset your Ideal boiler by model.
|Ideal boiler model||How to reset the boiler|
|Ideal Logic||Turn knob to marked reset position|
|Ideal Logic+||Single press on 'reset' button|
|Ideal Vogue||Switch off boiler, set heating controls to between 30ºC & 80ºC. Switch boiler on/off control to 'on'|
|Ideal Vogue Max||Switch off boiler, set heating controls to between 30ºC & 80ºC. Switch boiler on/off control to 'on'|
|Ideal Mexico HE||Press and hold 'reset' button for 2 seconds and release|
|Ideal Isar||Press and hold 'reset' button for 2 seconds and release|
|Ideal Icos||Press and hold 'reset' button for 2 seconds and release|
|Ideal Mini||Single press on 'reset' button|
|Fault code||Description||Heating engineer required initially?||Potential repair cost range inc. labour|
|F1||Low water pressure||No - Manually adjust pressure guage to between 1 & 1.5bar||<£100 if persists and engineer required|
|F2||Flame loss||Yes - only if you're sure that the gas supply to house is functioning||£60 - £150|
|F3||Fan fault||Yes - if boiler still doesn't function after restarting||£150 - £200|
|F4 / L4||Flow thermistor||Yes||£150 - £200|
|F5 / L5||Return thermistor||Yes||£150 - £200|
|F6||Outside sensor failure||Yes - if boiler still doesn't function after restarting||£100 - £200|
|F7||Low mains voltage||No - contact an electrician or electricity provider||N/A|
|F9 / L9||Unconfigured PCB||Yes||£300 - £350|
|L1||Flow temp too high or no water flow||No - first manually adjust flow temperature to lowest setting||£100 - £200 if persists and engineer required|
|L2||Ignition lockout||No - Check condensate pipe for blockages or frozen if winter||£30-£75 if you require assistance|
|L6||False flame lockout||No - resetting the boiler is first advised||£80-£150|
|LC||5 boiler resets in 15 minutes||No - switch electricity supply to boiler on and off again first||£100-£150|
|FA||Negative differential flow/return rate||Yes||£200-£300|
|FU||Flow/return differential > 50°C||Yes||£200-£300|
|DU||Diverter valve in mid-position for service||No - rotate all knobs fully clockwise, turn boiler power off and on and then hit 'restart'||N/A|
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