We've got a Ravenheat HE85T (I know, its a cack boiler) and it's recently started palying up with the hot water.
When we use the shower or bath, the water is hot for a while, then goes cold, then heats up again, as if the boiler can't keep up. The water from the taps in the bathroom sink and in the kitchen are fine though. They get hot and stay hot.
The boiler fires up as it should when the shower or bath is run, and hasn't cut out (as far as I know!)
Is it likely to be a flow rate problem? The bath taps stay hot if I turn it right down to a trickle, but the shower won't go to a flow rate low enough where the boiler still keeps running. Even on it's lowest flow the water runs cold before heating up again.
So far the fan mod has packed up (known problem, fixed by Ravenheat under guarentee) and the diverter valve was replaced last year.
I don't know a huge amount about boilers, most of what I know is from reading other posts on here, but I'm prepared to try a few fixes myself.
Thanks in advance for any help!
When we use the shower or bath, the water is hot for a while, then goes cold, then heats up again, as if the boiler can't keep up. The water from the taps in the bathroom sink and in the kitchen are fine though. They get hot and stay hot.
The boiler fires up as it should when the shower or bath is run, and hasn't cut out (as far as I know!)
Is it likely to be a flow rate problem? The bath taps stay hot if I turn it right down to a trickle, but the shower won't go to a flow rate low enough where the boiler still keeps running. Even on it's lowest flow the water runs cold before heating up again.
So far the fan mod has packed up (known problem, fixed by Ravenheat under guarentee) and the diverter valve was replaced last year.
I don't know a huge amount about boilers, most of what I know is from reading other posts on here, but I'm prepared to try a few fixes myself.
Thanks in advance for any help!