I am having problems with my central heating system which is a boiler/ hot water tank type.
- The downstairs rads are all ice cold except for the top third and bits at the side that are warmish
- The system gurgles and rattles.
- The boiler cuts out (reset switch pops out) after about a minute of use
- Before it cuts out the hot water tank and pipes rattle like mad and it feels like something's going to blow up. Theres also a loud knocking in the boiler sometimes before it cuts out.
- Both hot water and heating cause these effects
From what I have read this sounds like rust floating about in the system clogging everything up. I have drained the rads and it was pitch black liquid. System is about 15 years old.
Is it too late to be able to clear it out with a drop of chemicals. Does it need a whole 'powerflush'?