Tommy Mac Discussions Forums Fix-it Forum: Home Improvement & Do It Yourself Repair Forum Taco zone valves don’t give signal to furnace relay

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    • #41158
      Henry Ayre

      A Honeywell L8148J furnace relay began giving erratic service and was replaced with a new one. Now the Taco 570 zone valves have stopped giving the 24 volt signal to the relay to operate the magnetic switch in the relay. Nothing was changed with the zone valves. What is causing the zone valves, which operate normally otherwise, from giving the 24 volt signal to the relay?

    • #214261

      still working to provide your 24 voc control power? Loose, intermittent connections? Luck, Kizmet

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