System was working fine yesterday with the Alpha pump set on lowest proportional setting. I noticed in the evening the radiators barely warm. So opened up the trvs no difference. Rads warm to the touch but no more. So checked oil boiler over nothing looking amiss. So I switched the pump over to fixed and set to highest. Rads now nice and hot. As it has been set to lowest proportional for ages, years, and rads got hot why the sudden change? Am I missing something obvious here?
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Grunfos Alpha pump
- Thread starter Bogart
- Start date
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