Cold spot on rads

[Toolbox]

Got a flush and mag filter fitted I had sludge in rads downstairs 3 days ago by heating engineer from trades website and he had good reviews.From on set tried to sell new system which I can't afford. 4 rads downstairs still have sludge he never mentioned this to my wife she did not check paid him and he left.
Today one rad got a pin hole and a drip coming from my boiler.
Phone the engineer he said need 4 new rads plus boiler He is not prepared to fit a new rad guess he's not coming back Mmmm let down I think

Checked and pump set to max speed.

should l put more chemicals in the system close all the good rad and only feed the slugged up rads for a couple of weeks then drain system and if necessary removed any sludged up rads and put water threw them
I have ordered a new rad to replace the one with the pin hole.

My system is a worcester combi Boiler and it's a gravity fed and vent system

Is their anything else I can do

 

[durhamplumber]

engineer from trades website and he had good reviews.

Take no notice of those.If your sysyem is full of sludge,merely fitting a filter is a waste of money.I am no expert on really badly sludged systems but I would at least say you need every rad taking off and flushing outside,then add cleaning chemicals.If your pipes are 8/10mm then that is probably a waste of time...If it is at the stage where your rads are pinholing and multiple cold spots,your best option could well be entire new system.

 

[dilalio]

Very hard to form opinion without seeing the site conditions.

 

[durhamplumber]

Very hard to form opinion without seeing the site conditions.

Can form quite an accurate idea from description and experience though.

 

[dilalio]

Can form quite an accurate idea from description and experience though.

Descriptions are often vague and sometimes false!
My experience tells me, I'd want to see it, because pinholed rads tells of an old and neglected system, which would have lead me to flush it, only with eyes on appraisal and then copious caveats in my estimate to do so.

 

[dilalio]

Very hard to form opinion without seeing the site conditions.

My post above was aimed at the OP @durhamplumber not you.

Can form quite an accurate idea from description and experience though.

 

[durhamplumber]

My post above was aimed at the OP @durhamplumber not you.

Nee worries.