Smart Home Device

Google Nest Learning Thermostat (3rd Gen)

Real-world failure timing, repair cost, and source-linked reports for this model.

Durability signal A · based on reported timing

1 reports

Timeline

When failures are reported

Buckets show how reports cluster by months after purchase.

Avg months to failure

120

Total reports

Avg repair cost

—

Still recommend

—

% repaired

% mfr warranty

% extended warranty

—

% support helpful

—

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Failure types

Reports

Recurring E105 low-voltage / wiring-changed gear error

Thermostat / baseplate power sensing

120 months

Source-linkedVerify source — Reddit post

Reddit post by u/Creative_Name_3269 (r/Nest). Over-10-year-old Nest Learning Thermostat 3rd Gen kept showing a gear error / E105 low-voltage wiring-changed message for days while HVAC still ran. Owner asked whether the Nest itself was failing after HVAC techs found no A/C fault.

Not under mfr warranty

View report details

Months until failure

120 months

Repair cost

Not stated

Repaired

Manufacturer warranty

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

Confidence

86%

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