Everyone please. Do this work yourself! $50.00 is over $500.00 if you call the HVAC guy. There is a video on youtube. There are online resources, my goodness, write to me! It took me 35 minutes. No need to drain the boiler, just turn off the power and use your phone to take clear pictures of where the wires are running. If your boiler does not start, this is one of the possible reasons.
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