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How can I test my furnace C-wire with a multimeter to figure out why my new Nest thermostat is throwing an E298 error code?

ChatGPTgpt-61 query11/1/2026
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The searches the AI actually ran for this prompt.

SEED QUERY
How can I test my furnace C-wire with a multimeter to figure out why my new Nest thermostat is throwing an E298 error code?
1 real search · 1 real-search pass
Google Nest thermostat E298 error code official support C wire troubleshooting multimeter 24VGoogle ↗
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Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

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Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

Classifying 1 queries…

Searches and sources

ChatGPT1 real searches · gpt-6
Google Nest thermostat E298 error code official support C wire troubleshooting multimeter 24V Google ↗

Queries

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Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Google Nest thermostat E298 error code official support C wire troubleshooting multimeter 24V
OBSERVED
Google ↗
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