Fix Fault Vokera Compact 35 He

what is the age of this boiler ? vokera compact 35 he 892 c28 50290

I bled my radiators ,can there be a problem with my boiler as the hot water runs hot and cold ...the water feels different ..i did my washing and i feel the washing was dirty when it came out ... rea ... more

could someone please tell me what the black knob on the rightside off my boiler is for ty

can someone please tell me what the red wheel at the rightside base of my boiler is for ..ty

i live in a 2 bedroom semi ..lpg ,gas hob, 7 radiators,i am currently receiving gas 2 monthly ..1200ltre tank .5th march i paid 651.00 to have it filled ,,,now 12th may and need another 1200 litres .. ... more