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M20/E298 error but when test wires I have adequate voltage

BEinDC
Community Member

My Nest keeps disconnecting from Wifi and turning off because of M20 and E298 error messages. When I check the power information, it shows that voltage is fluctuating to the thermostat. However, when I use my multimeter to check the voltage to the thermostat it is steady at 24V. What gives? Is the thermostat defective?

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