Recent content by petes7457

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    Grant Combi Max - pressure loss problem

    No, not that I can see.
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    Grant Combi Max - pressure loss problem

    Hi, Changed the fill loop and associated leaky valves on the above boiler. Drained boiler and refilled. Checked expansion vessel pressure at 1 bar when system full but at zero pressure. Re-pressurized to 0.75 bar and checked. System run in CH mode for 1 hour and worked fine. HW fine also...
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    Grant Combi Max oil-fired boiler overtemperature problem

    The above boiler randomly exhibits an over-temperature lock out. Happens when in CH mode or HW delivery mode or just after periods (overnight) when it is topping up its hot water store. Any suggestions as to what to suspect - over-temp sensor, thermostat sensor or pump? (The pump certainly...
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    Grant Combi Max oil-fired boiler problem

    Thanks, I've already changed the oil pump and integral solenoid valve as a precaution. Control electronics seems fine. Cheers, Pete
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    Grant Combi Max oil-fired boiler problem

    This is a very unusual boiler fault. Following an overnight power outage I awoke to find the above boiler spewing out thick black smoke from the flue. After powering down and checking I found around 2 liters of unburnt oil in the base of the burning chamber that the Riello burner fires...
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