Have have just renovated a house for my In-Laws and the last job (why did I put this off??) is the boiler.
I am coming here as Baxi give me snippits of help, but keep refusing to talk any more as I am not "Gas Safe", so I hope someone here might be able to help.
It has an Baxi Instant 80HE, which only intermittently detects HW flow... It works when I turn on the bath tap (lots of water), but not the sinks..
I have looked at the mechanism which detects flow, and its obvious what the issue is.. When I turn on the tap, the "pin" that presses the microswitch comes out long and hard.. But when I turn on the sink taps, it only comes out 1/2 way and I can easily push it back.
At the weekend I had a look at the diaphragm and associated mechanism and it was sound.. I cleaned of a bit of scale and it made little difference.
So then I moved onto the "Venturi" which was something that Baxi told me to look at. They said that sometimes the splines come off of the cage. So I removed the cartridge, and to my surprise, the Venturi was missing. I checked inside the opening with a mirror/torch and its not there. The Venturi is awol.
So I would hope this could be the cause.. But a call to Baxi today resulted in them telling me that it WAS there as teh boiler wouldn't work at all without it. They refused to accept that in my case the venturi was missing.. And the boiler works some times and simply refused to speak to me.
Does anyone with Baxi knowledge know why my venturi is missing? And why the boiler still works??.
How confident are you that if I simply replace the venturi is will solve my problem?
Thanks in advance for any advice.. I need to get this fixed quickly now as they have moved in and have no reliable hot water, so don't have time on my side.
Jon
I am coming here as Baxi give me snippits of help, but keep refusing to talk any more as I am not "Gas Safe", so I hope someone here might be able to help.
It has an Baxi Instant 80HE, which only intermittently detects HW flow... It works when I turn on the bath tap (lots of water), but not the sinks..
I have looked at the mechanism which detects flow, and its obvious what the issue is.. When I turn on the tap, the "pin" that presses the microswitch comes out long and hard.. But when I turn on the sink taps, it only comes out 1/2 way and I can easily push it back.
At the weekend I had a look at the diaphragm and associated mechanism and it was sound.. I cleaned of a bit of scale and it made little difference.
So then I moved onto the "Venturi" which was something that Baxi told me to look at. They said that sometimes the splines come off of the cage. So I removed the cartridge, and to my surprise, the Venturi was missing. I checked inside the opening with a mirror/torch and its not there. The Venturi is awol.
So I would hope this could be the cause.. But a call to Baxi today resulted in them telling me that it WAS there as teh boiler wouldn't work at all without it. They refused to accept that in my case the venturi was missing.. And the boiler works some times and simply refused to speak to me.
Does anyone with Baxi knowledge know why my venturi is missing? And why the boiler still works??.
How confident are you that if I simply replace the venturi is will solve my problem?
Thanks in advance for any advice.. I need to get this fixed quickly now as they have moved in and have no reliable hot water, so don't have time on my side.
Jon