The 2-way valve on my HW developed an intermittent fault, which was tripping the RCD on my consumer unit, so I was advised to replace the 2-way valve.
I drained down the CH system, removed the old valve, fitted the new one, and released the ballcock to fill the CH system again. I've not been able to bleed all of the rads yet, as the bleed valves are too tight, but I assumed I could still get HW, and sort the CH out another day. Now when I call on hot water, the new 2-way valve moves the lever over to B, the boiler fires up, and then after a few minutes the boiler stops again.
Therefore, I am not getting sufficient HW. Any ideas as to what I have done wrong?
I drained down the CH system, removed the old valve, fitted the new one, and released the ballcock to fill the CH system again. I've not been able to bleed all of the rads yet, as the bleed valves are too tight, but I assumed I could still get HW, and sort the CH out another day. Now when I call on hot water, the new 2-way valve moves the lever over to B, the boiler fires up, and then after a few minutes the boiler stops again.
Therefore, I am not getting sufficient HW. Any ideas as to what I have done wrong?