Valve is a silver box with a pipe in the top and out the bottom,
Has a lever on top when no demand for heat the lever will not move freely
When the stat calls for heat the lever will become loose then telling the
Boiler to fire.
Sounds like either a broken valve or the pcb in the boiler has packed up,
Is it a very old system?
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Turbo 2000 and tommy kayira track day beasty
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