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  • Writer's pictureDaniel Jackson

How to: Top up the pressure on your Main Eco Compact Combi Boiler - E118

Are you getting the E118 flashing error code on your Main Eco Compact boiler? or are you just looking to top up the pressure? Well we have created a YouTube video which shows you how to do that.


You can watch it below or on YouTube



This video shows you where and how to increase the pressure of your Main Eco Compact boiler. Under the boiler on the right-hand side, you will find 2 blue levers. These blue levers quarter turn to allow water to flow into the heating system to help increase the pressure.


If you find the pressure keeps dropping regularly then you may have underlying issues with your heating system that need looking at by a Gas Safe Registered engineer. You can find your local GSR on the Gas Safe website.



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