Hi, this is my first post/cry for help.
Since moving into this house about 4 years ago (house is 8 year old), the central heating has never been quite right, in that the central heating would come on whenever the hot water is on, but we lived with it by turning down the TRV's in summer.
Recently, the boiler has been refusing to ignite when the programmer/cylinder stat has been calling for heat. I played around with the 3-port valve (Sunvic SD2701F) and got it working for a short while by flicking the manual/flush lever. But it stopped working again after a few days. I tested the valve actuator by altering the room stat and cylinder stat and found that it was duff, so I bought a new one. Once fitted, the boiler fired up first time, but I still got central heating whether I wanted it or not. Then after a few days, the boiler would not ignite again.
I took off the actuator and turned the valve spindle by hand. By luck more than anything else, I heard the boiler ignite and hot water began to flow. To my surprise, it went throught the divertor and off to the hot water cylinder only. No CH! I think that's the first time I recall it EVER doing that. So, with the cylinder stat turned up and CH turned off, I try and fit the actuator to the valve, but it wants to be on at 90 degrees to where the fixing plate is!
Could this explain why the system has never worked properly, and what can I do to fix it (bar draining the system and checking the valve/fitting a new one).
Thanks.
Sean
Since moving into this house about 4 years ago (house is 8 year old), the central heating has never been quite right, in that the central heating would come on whenever the hot water is on, but we lived with it by turning down the TRV's in summer.
Recently, the boiler has been refusing to ignite when the programmer/cylinder stat has been calling for heat. I played around with the 3-port valve (Sunvic SD2701F) and got it working for a short while by flicking the manual/flush lever. But it stopped working again after a few days. I tested the valve actuator by altering the room stat and cylinder stat and found that it was duff, so I bought a new one. Once fitted, the boiler fired up first time, but I still got central heating whether I wanted it or not. Then after a few days, the boiler would not ignite again.
I took off the actuator and turned the valve spindle by hand. By luck more than anything else, I heard the boiler ignite and hot water began to flow. To my surprise, it went throught the divertor and off to the hot water cylinder only. No CH! I think that's the first time I recall it EVER doing that. So, with the cylinder stat turned up and CH turned off, I try and fit the actuator to the valve, but it wants to be on at 90 degrees to where the fixing plate is!
Could this explain why the system has never worked properly, and what can I do to fix it (bar draining the system and checking the valve/fitting a new one).
Thanks.
Sean
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