Hi, I have a room that is not getting heat, I want to check to see if
the Taco Power Head is getting the 'Proper' Voltage to operate it.
How do I check this with a mulitmeter? It has 3 wires to the Power
Head, Where do I put the leads? For example do I put the positive
lead on the wire closest to the zone valve and the negative to the
pipe? Or do I put the positive side on the furthest wire from the
zone valve and the negative on the middle etc, etc.....