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My Ideal Isar HE 35 runs funny, turn the hot tap on and after a min or so it runs hot then cools down to luke warm, then gets warmer, then red hot then warm, then cold, and so on Any body any ideas? Thanks Brian

I have purchased a new filling loop for my Ideal Isar boiler, but it comes with a non return valve, the old one didn't have one, so does anyone know which pipe I put the NRV on, does it go on the left or right as I look at it? Thanks.