Question about Heating & Cooling
First, find the wiring diagram and a voltmeter. Attach one lead of the meter to a good ground. Then trace the voltage as laid out on the diagram. For example, if you have voltage to a switch or device, but no voltage out, then that device may be defective. Check all connections. Your boiler has "self diagnostics" but with no display a simple power problem is indicated. If you have no wiring diagram check with the manufacturer online.
Posted on Nov 16, 2008
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Posted on Jan 02, 2017
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