Low hot water pressure from a combi boiler

[Maisie's dad]

Hi there and happy new year. If the cold's fine pressure (flow)wise shouldn't hot be too on a combi boiler?
Any ideas welcomed

 

[HarrogateGas]

All depends on what combi you have. Bit more info needed.

 

[1974stephen]

My combi (ferroli) slows down the hot rate if the incoming cold water is very cold so to achieve the requested output temperature that has been selected.

 

[Maisie's dad]

Hi there
thanks for your replies, the boiler is a Worcester 24i and the rad trvs are set on 3. When you turn the hot tap on at the kitchen sink by the boiler you get a spurt the trickle for 3 secs then nothing. Upstairs you get even less.
The pump looks ok, I took out the screw and rotated it, and was set on 3.

Many thanks in advance

 

[Roddders]

When pump isworking, if you place a towel under pump. When the pump is working i.e. power is sent to it if you undo the screw and place a screw driver gently in it you should feel the pump turning causing a clatter against the screwdriver as you gently touch it against the internal fins

 

[scatmanjohn]

Pump has nothing to do with it.
Sounds like you have something resricting the flow to the hot taps.
Could be within the boiler or in the pipework.

 

[kevplumb]

there is a flow restrictor in the flow turbine and a filter in the isolating valve

methinks a good place to start

 

[Maisie's dad]

Can anyone explain how I can fix this please in clear terms

 

[Maisie's dad]

In particular KEVPLUMB as I think this must be the problem as the 1st tap (kitchen sink) is only three feet away from the boiler. Also she's not firing up now!!!

 

[kevplumb]

read the installation and servicing instructions
if you have not got them e mail me (adress in profile )

and make sure the boiler isolater is open