As far as I know there is only an overheat cutout in the boiler no thermostat it just runs at 1800 watts
I use a power controller but only on pothead spirit runs or when using a real grain wash which are volatile
Maybe the water pressure is varying hugely in your neighbourhood or is your power supply stable ?
One last silly thought it only requires minute movement of the needle valve to cause big cooling water temperature fluctuations I have a small lever bar epoxy glued on the valve head so I can make tiny adjustments. just a thoughtStatistics: Posted by Admiral Toad — Fri Oct 04, 2013 12:00 pm
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