50 mins ago rick asked ... How can I fix my portable Zenith DVP615 DVD player? When I p?    |    3 hours ago Jim asked ... How can I get my scarifier to work?    |    george crawford asked ... Citroen C3 Picasso?    |    Maggie asked ... How can i mend my kettle?    |    Anthony asked ... Can a crack be repaired?    |    Click here to ask your question

what does f.22 means on a vaillant boiler?

on my vaillant boiler f.22 appears what does it mean pls and the hot water gets cold once this appears f.22
johnny, January 2009
can be a number of things but most likely low water pressure in system, can be confirmed by pressure gauge on front of boiler, too low if below green band.

tojo, February 2009
link Click here to see other fixes for Vaillant.