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Ideal Logic, Vogue and Mexico boiler fault/error codes

Heating Advice

F1, L1? Ideal boiler fault codes, what do they all mean? Whether you've got an Ideal Logic, Vogue or a Mexico. Here's some clues.

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:

1. Is it covered under the Ideal warranty?

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.

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2. Try resetting your Ideal first

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 

Ideal boiler error codes [applicable to Ideal Logic, Ideal Logic+, Ideal Vogue + Ideal Mexico]

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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