Wiring issue with troll a temp HZ300

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Sludg
Sludg Posts: 2
in THE MAIN WALL
All is working fine except when zone 2 which was slave thermostat attempts to start furnace. It will not light. Slave thermostat is a 4 wire. what am i missin??

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  • Sludg
    Sludg Posts: 2
    I forgot to tell. I have replaced troll a temp with the HZ311

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