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WeilMclain control unit keeps...melting?
I have a WM CG-5 spdn from around 1995. We haven't owned the house that long but I switched over to pex and a cross manifold and things were ok for a while. While the boiler goes up to temp I've noticed that the control box (located inside the boiler) is basically melting from the heat of the boiler when it's running up to temp. That can't be normal right? I see online pics of the insides of other such boilers and they have the control box (UTEC) located in the same place... am I missing something here? The thermostat control is set to about 180-190, but I know it's about 10F off from prior service notes, and the temps I get at the manifold are in the 170 range out to the rads.
I preemptively ordered an extra control box, and sure enough this morning I had to put it in. I also wrapped it in reflective heat shielding for car stuff, and hoping that makes a difference. I attach a pic of the new (but now melted) board and the second new one with the sticky heat insulation trying to shield it. You can already see that the one I put in this morning is already wavy/melty in one or two spots. Boiler working fine once again and the rads are hot.