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Voltage for Nest requirements, please help

Shadow_Trekker
Community Member

‎02-19-2024 07:23 AM

I measured the DC voltage coming from the HVAC board, the multimeter indicates that it is supplying 21.3 volts. I think this is going to be a problem due to the info I could find, which mentioned the supplied range should be "29 to 42V". I hope this won't be a problem, if so, would it work to disconnect that power and utilize a Nest Power Connector?

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Markjosephp
Community Specialist
Community Specialist

‎02-22-2024 08:24 AM - edited ‎02-23-2024 05:12 AM

Hello Shadow_Trekker,


I'm glad that you took the initiative to measure the DC voltage from your HVAC board. It's important to ensure compatibility when installing a Nest Thermostat. While the specified range is ideally between 29 to 42 volts, the 21.3 volts you measured might pose a challenge.

It's advisable to adhere to the suggested voltage range to ensure the proper functioning of the Nest Thermostat. If the voltage falls outside this range, it might lead to performance issues or even damage the device over time. The Nest Power Connector is designed to provide a consistent power supply, and using it could potentially address the voltage discrepancy. Disconnecting the power from the HVAC board and utilizing the Nest Power Connector might be suitable.

Let us know if you have more questions.

Best regards,
Mark

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