Blocked boiler?

[AllyBongo]

I do some work for a letting agent. Got called to a property with poor heating and hot water. A few rads were just heating and the HW was barely heating. Tenant told me the last guy who was at it put in sludge remover. Ok, so he flushed the system..... No he put 1 litre of X400 in last year in December and just left it. Anyways, I suspected the pump. Usual with this... Pump valves wouldn't shut. Drained the system, water was filthy, took out the old pump which was full of sludge. Flushed the system and re-filled with new pump/valves fitted. Still wouldn't circulate, system is full with no air locks. I tried running the pump round the rads, cylinder and bypass seperately. Heat just would not get out the boiler. So came to the conclusion the boiler must be blocked. Can leaving sludge remover in cause any damage??

 

[Billy Bob Bob]

I do some work for a letting agent. Got called to a property with poor heating and hot water. A few rads were just heating and the HW was barely heating. Tenant told me the last guy who was at it put in sludge remover. Ok, so he flushed the system..... No he put 1 litre of X400 in last year in December and just left it. Anyways, I suspected the pump. Usual with this... Pump valves wouldn't shut. Drained the system, water was filthy, took out the old pump which was full of sludge. Flushed the system and re-filled with new pump/valves fitted. Still wouldn't circulate, system is full with no air locks. I tried running the pump round the rads, cylinder and bypass seperately. Heat just would not get out the boiler. So came to the conclusion the boiler must be blocked. Can leaving sludge remover in cause any damage??

what boiler is it?

 

[AllyBongo]

Glow Worm Fuelsaver 55f

 

[Billy Bob Bob]

from memory this is a low water content boiler if it was blocked the high limit stat would constantly be kicking in have you checked the boiler over,condition,bp,gas rate etc?

 

[Billy Bob Bob]

sorry im off the point here just wondering if any of you have experience with the ideal logic system18

wait your turn......

 

[Billy Bob Bob]

Sorry when your ready

go back to the thread you started on this issue,i am sure someone will help out soon

 

[AllyBongo]

BP was fine. Boiler kept firing then clicking off. When the pump over run was on with the bypass fully open it wouldn't circulate round that, its only about 2m round the boiler. The boiler is old, im trying to push a new boiler.

 

[Billy Bob Bob]

BP was fine. Boiler kept firing then clicking off. When the pump over run was on with the bypass fully open it wouldn't circulate round that, its only about 2m round the boiler. The boiler is old, im trying to push a new boiler.

sounds like it could be a boiler issue only other explanation is blocked primaries not a easy fault to trace until you start cutting pipes or find the hex blocked up

 

[AllyBongo]

Tell me bout it Gasman. Trial and error with old systems eh? Been at this fecker for 5 hours already! Hopefully a new boiler will be the outcome!

 

[Billy Bob Bob]

old systems yep pain in the proverbial go to do a simple job like move a rad and the neutral points blocked solid aND FITTED UNDER THE CYLINDER BY SOME DOUGHNUT NICE