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lost water pressure & boilerwill not heat water or heating ?

lost water presser & now boiler will not start up mistral oil comb boiler any ideas ?
mark willams, October 2016
No pressure means the boiler won't start.
Lack of pressure is probably due to a leak. Check rads, rad valves, pipework, diverter valve, pump, boiler itself, pressure relief valve.

XXX, October 2016