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Trane Invisible Radiator - repair
My house was built in 1935 and contains invisible or concealed radiators in all rooms. Several of the radiators do not heat. Is it possible to repair this type of radiator (I believe I have Trane Invisible Radiators - based on the literature posted on this website) without taking out the wall? All contractors that have looked at these radiators believe the only way to "repair" them is to take apart the wall and "have a look around"
Does anyone have experience with this type of radiator?
Please note, I am a homeowner (not a contractor nor a successful DIYr)