Combi Boiler Low hot water pressure

[Redrose2010]

I have I have an Ideal C35 boiler. We have really low water pressure from all the hot taps (should be getting 15 litres per min if using more then one stood completely).
On Friday Ideal came out and changed the diverter valve, heat exchange and motor but it has made no difference.
The cold taps are fine and the pressure into the house has been tested and is fine.
Anyone any ideas on what could be the issue?
The water pressure from the hot taps had been absolutely fine up to the last few weeks.

 

[Scott_D]

Has any work been done to water mains in the street?

 

[Redrose2010]

Has any work been done to water mains in the street?

No not as far as I’m aware. United Utilities have been out and said the pressure coming into the house is fine.

 

[townfanjon]

Check the cold supply lever to the boiler ( blue one I think ) is fully open . Has the cold water flow to the kitchen sink altered recently ?

 

[Redrose2010]

Check the cold supply lever to the boiler ( blue one I think ) is fully open . Has the cold water flow to the kitchen sink altered recently ?

Check the cold supply lever to the boiler ( blue one I think ) is fully open . Has the cold water flow to the kitchen sink altered recently ?

Just checked cold supply lever is fully open and no alterations to the kitchen sink recently.

 

[Scott_D]

Get the inlet filter checked and cleaned
Then you might need to cut in some tees on the cold into the boiler and hot out to confirm the boiler is restricting the flow

 

[king of pipes]

As Scott has said get the inlet filter checked and cleaned and also the flow turbine . Kop