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My Ferroli HE display is flashing orange with an error ''F'"
Hi my Ferroli HE display is flashing orange with an error ''F'" no hot water and no central heating. It was working an hour ago though? … read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
I have a ferolli optimax HE plus 31c boiler, which isn't
Hi, I have a ferolli optimax HE plus 31c boiler, which isn't working, it's flashing up orange with an F then the number 37… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
My Ferroli Optimax HE 31 C is flashing with error code "F"
My Ferroli Optimax HE 31 C is flashing with error code "F" 37 Both heating and hot water not working.… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
Hi Rick, Ive got a Ferroli Maxima 35c boiler, If the cold system
Hi Rick, Ive got a Ferroli Maxima 35c boiler, If the cold system pressure is .6 bar, when it is hot it is running at about 3.4bar. it sometimes throws up the F23 code but reset on the reset button yes… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
Hi I have a ferroli optimax he plus, and there is no hot water
Hi I have a ferroli optimax he plus, and there is no hot water / heating at the moment. The boiler is flashing orange with 31 f flashing up and the gauge is about 1.1. I think I need to increase the w… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
I have come back from holiday and the pressure was at zero
I have come back from holiday and the pressure was at zero on my vokera 29 boiler ( previously it had been losing pressure ). There is a red light which is normally green ? Help nancy… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
I have a Ferroli Optimax HE plus 38C. Fault code F37 [low water
I have a Ferroli Optimax HE plus 38C. Fault code F37 [low water pressure] Have filled the system via the black knobs but not sure whether these then have to be fully turned off or left open. Boiler fi… read more
qwasert
qwasert
Plumber
Vocational, Technical or Trade Scho
203 satisfied customers
Hi my Ferroli Optimax HE Plus 31 C is flasing orange with "F"
Hi my Ferroli Optimax HE Plus 31 C is flasing orange with "F" and thenflashing "40" both the heating and hot water are not working. Wht can I do to fix this please? Thank you mitchan… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
I have a ferroli optimax HE plus 31c - the pressure dropped
I have a ferroli optimax HE plus 31c - the pressure dropped yesterday, we refilled it via the filling loop but it keeps dumping the water immediately out through the condensating drain and flashes A01… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
I have a ferroli optimax he 31c and when the heating is to
I have a ferroli optimax he 31c and when the heating is to come on it tries to fire up but does nothing. When I open the hot tap the heating then comes on fine. The screen displays FH when it is tryin… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
Hi - we have a Ferroli Optimax HE 18S and keep getting an error
Hi - we have a Ferroli Optimax HE 18S and keep getting an error message (F37) and now need to top up the pressure most days to 1.5bar - boiler operates at 2.7 bar when heating on. We've had the expans… read more
Brian
Brian
Plumbing & Heating Engineer
742 satisfied customers
I have the ferroli optimax he plus 31 c installed about 6 months
I have the ferroli optimax he plus 31 c installed about 6 months ago. I am getting an f37 fault code which the instruction book says is low water pressure. It advises to fill the system. Could you tel… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
1,561 satisfied customers
Hi my Ferroli Optimax HE Plus 31 C is flasing orange with "F"
Hi my Ferroli Optimax HE Plus 31 C is flasing orange with "F" and then flashing "37" both the heating and hot water are not working. Wht can I do to fix this please? Thanks Lisa… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
ferroli optimax heating failing to come on, we have turned
ferroli optimax heating failing to come on, we have turned power on / off it seems to fire up but then turns off again. Any ideas ? have a housefull of guests tonight… read more
Andrew Smith
Andrew Smith
Engineer
Vocational, Technical or Trade Scho
3,793 satisfied customers
We have a 6 month old Greenstar CDi conventional wall hung
We have a 6 month old Greenstar CDi conventional wall hung RSF condenser boiler. We just got back from holiday and there is a flashing message saying EA alternating with the red Reset button flashing.… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
1,561 satisfied customers
I have a ferroli optimax 25 c which is 3yrs old. Ive held the
I have a ferroli optimax 25 c which is 3yrs old. Ive held the reset button for 5 seconds, but it refuses to start up? in the display window its showing LU ? which I cannot find reference to in the man… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
1,561 satisfied customers
hello! I have Ferroli Optimax HE 31 C boiler. Its brand new.
hello! I have Ferroli Optimax HE 31 C boiler. It's brand new. Has been used for a week maybe. Everything was working fine untill the display started flashing F37 fault. According to manual pressure is… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
1,561 satisfied customers
my feroli boiler keeps switching on and off when im running
my feroli boiler keeps switching on and off when im running a bath or washing up so my water is only luke warm. so it runs hot then cold i can hear the boiler clicking on and off every few minets same… read more
Rick Ridley
Rick Ridley
UK Heating Engineer
30 years on the tools
1,561 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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