Ideal Combi boiler 'Logic 24' shows F1 fault (though pressure seems correct)

[adeptican]

My Ideal Combi boiler ('Logic 24') keeps going to F1 fault, even though the CH system pressure seems correct (1.5 bar when cold and about 2bar when hot). I turned off the power and then reset the system, and after a few minutes wait, the CH worked again, but only for about 15 minutes. I then cut out and the F1 was flashing again. I re-checked the pressure and it seems exactly correct. Can anyone suggest what may be wrong? The system was installed by British Gas engineers, about 6 years ago.

Thank you... Al

[Max Demian]

I think you'll have to "get a man in" unless you're a gas engineer (in which case you wouldn't have to ask).

[Grumps]

Check your warranty. My Ideal boiler came with a 7 year warranty a couple of years back.

[RJH]

ITYF that it needs to have been serviced annually for that to work.

[adeptican]

I cannot find any warranty paperwork but I am pretty sure it was only 5 years for me.

[Harry Bloomfield]

Could the pressure sensor have failed slightly, or the indicated pressure not be accurate? Try adding a little more pressure to see if it helps perhaps..

[adeptican]

Hi Harry/Max.. Thanks for the input. Yes, the pressure sensor was my logical guess too. I did try upping the pressure up to 2 bar, but the F1 fault continued to show. Hopefully, replacing the sensor is an easy and inexpensive job.

Al

[Cynic]

I've not worked on your model but the old Classic Combis used to suffer crud blockages in the port to the pressure switch. This was a simple item to clean or change.

[adeptican]

Thanks, Cynic. Actually, I have already fixed it! It was a simple bad connection where the wires plug onto the pressure sensor. All it took was a little wiggle! I'm glad I didn't listen to everyone who told me to get a gas-safe plumber out! Long live D-I-Y!

Al

[adeptican]

How often do modern Combis *really* need servicing? Mine has been going fine for 6 years with no service (apart from one bad electrical connection, which I fixed with a simple wiggle). I'm wondering if I should pay to have a proper service now, or adopt the "If it ain't broke, don't mess with it" approach. Comments?

AL

Al