Recent: Mac Allister 35cm electric lawn mower?

Mend Ferroli Home Heating Systems

Mend Heating, Home Heating Systems
Find out how to mend it for free.

Ask Question
Mend Heating, Home Heating Systems
Find out how to mend Ferroli home heating systems

Mend > Home Heating Systems

Mend Ferroli He Boiler

f21 error message on ferroli optimax he 31c boiler?

f21 error message appears after running central heating on a ferroli optimax he 31c boiler

ERIC
February 2011
To much pressure in the system,release the pressure to 1bar by bleeding a radiator.If you release to much pressure recharge system to 1 bar.

David Jarvis
February 2012
Mend Heating, Home Heating Systems
Find out how to mend Ferroli home heating systems

How to mend ...

Find out how to mend just about anything howtomendit.com for free repair help, information and advice.
Mend Heating, Home Heating Systems
Find out how to mend Ferroli home heating systems