Re: Bush AC34, no sound.
I have modified the schematic for the AC34 to make it closer to yours.
Let's wait for Graham to check our thinking.
Then:
1) Put a link between the two red wires I have marked before
2) Power up and measure the UL41 pin 4 (green) and UL41 pin 2 (blue) again
PS: The UL41 is faulty and is putting stress on the other valves so we must not apply power for long.
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