Posted by David Morack on September 12, 2001 at 06:08:39:
My boiler is starting (i.e. burner, pump, heat, etc.) with the thermostat off. I took the thermostat off and with the 2 wires connected or disconnected the burner starts regardless. This is a 30 year old McClain PD model boiler. The boiler system works fine I just need to be able to control on/off from the thermostat not the power switch. Appreciate any help.
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