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Hello all....been without heat and hot water since before Easter..hope that plumber will be today....turn on hot tap and get instant hot rads….but no hot water...anyone know if this will require a part...am disabled and really need a bath...
As others I'd also suspect the diverter as the prime suspect.
However, try not to get ripped off. Most diverters have a cheap (ish) rebuild kit. You rarely need a complete replacement.