Nest Thermostat N72 Error
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Make sure the thermostat wires are connected to t1 and t2 of the heatlink. Then connect the ot1 and ot2 ports of your heating system to the ot ports of the heatlink. And of course ensure that 230v power is on. When logging into the nest app it says n72:
When looking on the nest settings on the devices themselves, the rh wire is grayed out on both. We have an oil boiler and a separate central ac unit all tied to these stats and its worked great until now, and. 57. 7k members in the nest community. Discussion on google nest products, including installation and configuration. Nest thermostat owners now say that they are getting error n72 with a message that reads "power wire rh detected. No connection to equipment. " no connection to equipment. " user reports indicate that the issue persists on both existing and newly installed thermostats, indicating that the hardware is not at fault as one would expect. If you are getting an e73 / 74 error message on your nest thermostat, which is code for rc / rh wire not detected. It actually works for most. (error on my nest reads = n72 :
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