System struggling to circulate-where to start?

[mylocalplumber]

Got a 3 bedroom house
6 big rads
and 160l UVHWC
Worcester Greenstar 24i system
New trvs fitted on all but 3 rads
system was balanced last year and all working fine

This year it just seems to struggle on the lower ground rads and 1 of the top floor rads. The towel rail at top of house gets red hot quick, the second rad top floor gets hot slowly and the 3rd rad is just cold.

checked as much as I can on the pump and all seems ok, plus it's only a couple of years old do would be very surprised if that.

Any suggestions?

 

[Masood]

Got a 3 bedroom house
6 big rads
and 160l UVHWC
Worcester Greenstar 24i system
New trvs fitted on all but 3 rads
system was balanced last year and all working fine

This year it just seems to struggle on the lower ground rads and 1 of the top floor rads. The towel rail at top of house gets red hot quick, the second rad top floor gets hot slowly and the 3rd rad is just cold.

checked as much as I can on the pump and all seems ok, plus it's only a couple of years old do would be very surprised if that.

Any suggestions?

If downstairs are struggling that sounds like sludge. Have you done a water quality test?

 

[Ch4 plumbing]

S or Y plan?

 

[mylocalplumber]

If downstairs are struggling that sounds like sludge. Have you done a water quality test?

Not sludge

 

[Ch4 plumbing]

Are the ground floor rads on drops? Could be air?

 

[mylocalplumber]

S or Y plan?

S plan

 

[IND_Nick]

Have you checked bypass is working. Gate valve or auto could be just taking easiest route back to boiler. I have had customers open then and turn them off by mistake trying to sort other issues.

 

[mylocalplumber]

Have you checked bypass is working. Gate valve or auto could be just taking easiest route back to boiler. I have had customers open then and turn them off by mistake trying to sort other issues.

Had it on maximum for a while and it seemed to cut out intermittently before the return had even started to heat. Auto bypass seemed to be working. Both towel rails warm up really well and all the other rads (standard compacts) seem to struggle a lot more.

 

[Sharp Point]

Had it on maximum for a while and it seemed to cut out intermittently before the return had even started to heat. Auto bypass seemed to be working. Both towel rails warm up really well and all the other rads (standard compacts) seem to struggle a lot more.

Is the pump a alpha2 ?

 

[lame plumber]

rebalance towel rails for starters and take it fm there

 

[Boilerbud]

Is towel rails not connected to dhw and other radiators on heating Zone valve (s-plan) ?

 

[turnpin]

I suspect balancing the system may be required....regards Turnpin

 

[REDSAW]

shut rads off that are heating up and see what you get