shower water going cold

[briandale]

i have a vokera boiler linea 24 28. when in shower the water goes cold and then hot again. can anyone help

 

[steved101]

whats it like with other hot taps?

 

[briandale]

same as shower

 

[xr4x4]

even if you fully run the hot tap?

what dos the boiler do when you run the tap?

 

[bengasman]

Your system is probably full of ****e, heat exchanger blocked

 

[itsthatphil]

sounds similar to my problem - here:

//www.diynot.com/forums/viewtopic.php?p=1854413#1854413

i *think* mine is due to a faulty air pressure switch - do you have the manual to look at the fault codes?