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- 11 Jan 2026
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Hello, I have a Secure H3747 and ptd setup to control a 2 heating zone and hot water system. All the wiring is fine and the unit is controlling the association zones.
I have two wired nest thermostats and as such have set the h3747 to have wired thermostats on zones 2&4 (this is what is wired to the unit as zone 1 is controlled by the ptd thermostat).
Anyway, the issue is I want to turn on hold until cancelled on zones 2&4 but when I navigate to this option for each of the zones I cannot turn it on, it won’t allow me to do anything.
Any help appreciated.
I have two wired nest thermostats and as such have set the h3747 to have wired thermostats on zones 2&4 (this is what is wired to the unit as zone 1 is controlled by the ptd thermostat).
Anyway, the issue is I want to turn on hold until cancelled on zones 2&4 but when I navigate to this option for each of the zones I cannot turn it on, it won’t allow me to do anything.
Any help appreciated.