Forum Discussion
Old-Biscuit
Aug 17, 2019Explorer III
AC Indicator....bad bulb
AC Indicator hot (black wire) comes off the AC Thermostat switch ...same place AC heater gets power
AC Indicator nutral (white wire) goes dirctly to terminal block...same place heater neutral goes to
DC flame meter is a function of thermocouple
Blue wire to selector switch goes to Flame Meter
Red wire from Flame Meter goes to ground connection on AC thermostat Switch
You know thermosouple is working cause gas vlave is staying open otherwise it woud trip if thermocouople wasn't generating current
See pg 13
N305 Manual
AC Indicator hot (black wire) comes off the AC Thermostat switch ...same place AC heater gets power
AC Indicator nutral (white wire) goes dirctly to terminal block...same place heater neutral goes to
DC flame meter is a function of thermocouple
Blue wire to selector switch goes to Flame Meter
Red wire from Flame Meter goes to ground connection on AC thermostat Switch
You know thermosouple is working cause gas vlave is staying open otherwise it woud trip if thermocouople wasn't generating current
See pg 13
N305 Manual
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