potterton puma 100e piece of cack has stopped again

[nickwalt]

hi chaps; im throwing myself in the pot for advice; the back ground may be long but hopefully will prompt a solution.
had boiler 3/4 years and it stopped ch'ing waggled wires found loose pin and resoldered ~ sorted
then last week ch stopped again thought sod it bought new board cause i could'nt solder it up again. then fitted board. boiler fired up lasted about 20 seconds then sounded like it was boiling in the heat exchanger, and hissing out of the bleed valve on top hot water gave up then as well. undid black knob on pump it felt like it was spinning but i believe the impeller breaks off?

ideas please;

 

[gavinda]

suggest you get someone that knows what they are doing in

 

[screech]

do not resolder old pcbs, especially puma ones which tend to burn out!

there's loads of possibilities on these boilers, take your pick from knackered pumps, sticking microswitchs, jammed wax capsules, blocked heat exchangers, inaccurate thermistors

 

[outkastchris]

was this guy on rouge traders the other night

 

[steve32]

turn heating off, run hot water tap approx 1 min turn tap off feel 22mm heating pipes under combi, diverter valve should open within approx 30 sec to dump heat from combi if pipes don't get hot or goes to lock out diverter valve may need replacing also check pump.
I would suggest this combi is a lot older than 3/4 years.
if you have drained combi then it may be air trapped in heat exchanger.

 

[gavinda]

^^^^^what are you talking about. that dicerter is closed for hw.

 

[steve32]

after hw is turned off diverter should open

 

[gavinda]

no , the diverter only opens when ch demand has melted the wax capsule. one of us is talking about a different boiler . i dont think its me