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    I checked the Zone Valves. Placing a jumper wire...

    I checked the Zone Valves. Placing a jumper wire between terminals 3 & 4 on the control panel started the circulating pump. I also checked the voltage between terminals 3 & 4 and it was +/- 12...
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    Taco ZVC404-EXP Problems

    My 8 Zone radiant floor heating system is controlled by 2 Taco ZVC404-EXP Controllers. One is the Master and the other one is the Slave. The system is 3 1/2 years old and has been working fine up...
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