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I've spent the last two days working on my Worcester 280 combi. The symptoms were hot/cold DHW and occasional tripping out. I replaced the secondary heat exchanger for a plate exchanger (a Worcester upgrade) and put a new expansion vessel in. I fired it up last night and CH was good but had...

I've just changed the secondary heat exchanger for a plate heat exchanger on my Worcester 280. I also changed a u/s expansion vessel as the bladder had perforated. Initial testing proved good (see previous topic!) but just found a bizzare fault when drawing hot water. Previous topic...

Hi folks, further to my recent post (suspected faulty gas valve and scaled/sludged heat exchangers) I've run a sludge remover thru the system but noticed the pressure does not return back to the previous pressure at cold. I've reset it twice now to 1 bar (filling loop is off!) but when the...

I'm looking to run a sludge 'remover' to my combi system before changing the secondary heat exchanger and had this idea in mind: (Worcester 280) Put hose pipe on a down stairs drain point and open. As the system empties open the filling loop to replenish as it drains to minimze air locks and...

Hi folks, just having a look around for advice and info regards a couple of faults with the above mentioned boiler. The hot water runs hot(ish) and cold alternating. The hot water supply is slower and generally not as hot as it should be. It trips out occasionally (reset with a small button on...