30 CDi EA error code

9 Aug 2022
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United Kingdom
Boiler was working fine but I needed to top up the water as it was in the red. Filled to 1, then this morning came down to EA error code so I pressed reset…several times to no avail. Reverts back to error code. previously when this has happened and i top up to above 1, it drips water for a bit. Any ideas anyone? Could the gauge be faulty and I’m over filling??
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update: switched the boiler back on today..gauge had jumped right round the 3 from barely 1! But the boiler fired up 1st time and is now fine.
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