Author Topic: Nest gen 3 problems  (Read 560 times)

Offline Mmtc79

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Nest gen 3 problems
« on: December 24, 2017, 01:36:40 PM »
Installed new nest have had some errors popping up saying loosing power code 73 I believe this a new install with 5 wire lvt and common hooked up voltage is good etc thinking its a bad nest out of box

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Re: Nest gen 3 problems
« Reply #1 on: January 02, 2018, 03:10:24 PM »
The E73 error says,

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The Nest thermostat isn't electrically detecting your Rc wire.

Rc is internally connected with Rh, so there's no need to actually connect a wire to Rc if you wired Rh.

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Unlike most thermostats, the Nest Learning Thermostat does not require a jumper wire between Rh and Rc

The N73 error says,

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Your Nest thermostat isn't electrically detecting your W1 wire, but one is connected to the Nest thermostat base.

Did you end up replacing the NEST?  Was yours defective?