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Thank you. I'll try that tonight. The digital gauge is now ready 2.4. Is this night? 0.9 increase when running central heating?

Hi, Ive googled as much as I can but am now looking for some advice from somebody thats knowledgable in this area. My Valliant boiler as been showing the F75 error since we moved in about 6 months ago. About once every 7-10 days I have to recharge/repressure the system. From what I...