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digital thermostats

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cmorella
cmorella Member Posts: 1
in THE MAIN WALL
i recently installed a new weil-mclein steam boiler(ng)model peg45,i had a honeywell t8775a digital thermostat which is less than a year old,when i fired up the new boiler,the thermostat would'nt fire the boiler,all it did was start the dampner and thats it,i jumped the thermostat wires and it worked fine.i prefer a digital thermostat instead of a mechanical one,i tried both honeywell and weil-mclein with no reasonable solution..any suggestions?

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  • Mark Walnicki_2
    Mark Walnicki_2 Member Posts: 32
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    isolation relay?

    I wonder if there's more going on in the boiler control wiring than the t'stat can handle? Maybe an isolation relay would work?
  • jim lockard
    jim lockard Member Posts: 1,059
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    E.O.L.

    Did you install the end of line resister across the T-Stat termials? Best Wishes J.Lockard
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