A relative has a Worcester 9.24 electronic RSF combi boiler. She has been complaining about poor hot water flow rate for some time and how long it takes to fill a bath. With the hot tap wide open and water running hot, I measured the flow rate into a container and got 5.25 litre/min in the bathroom, 4.8 litre/min at the kitchen hot tap down stairs. (Boiler upstairs) This is on the "Summer" setting. The manual quotes flow rates 9 litre/min Summer, 7 litre/min Winter. The rate I am getting is therefore less than 60% of what it should be.
I have not measured the incoming mains water pressure as I don't have a gauge. (maybe could get one at B&Q that will screw into the washing machine tap?) However the kitchen sink cold tap gave a healthy blast.
The boiler is due a service in a couple of months but I don't think that is going to make much difference as she said it was poor even after the last service (burner pressure, etc.ok)
Any ideas what the problem could be?
Rockydell