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What is the exact wiring difference causing a Nest Learning Thermostat M35 error on a two-wire boiler system versus a standard C-wire setup?

ChatGPTgpt-61 query11/1/2026
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Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
What is the exact wiring difference causing a Nest Learning Thermostat M35 error on a two-wire boiler system versus a standard C-wire setup?
1 real search · 1 real-search pass
Google Nest Learning Thermostat M35 error two wire boiler wiring C wire meaningGoogle ↗
OBSERVEDOther / navigational

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

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

ChatGPT real searches (1)
Short factOther / navigational100%ComparisonConsequenceReasonDefinitionInstructionYes / no

Classes come from the query-classifier (a local Laya model). 1 of 1 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.

Searches and sources

ChatGPT1 real searches · gpt-6
Google Nest Learning Thermostat M35 error two wire boiler wiring C wire meaning Google ↗
  1. Learn about the common or C wire · support.google.com
  2. Nest Learning Thermostat · support-assets.nest.com

Queries

1 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Google Nest Learning Thermostat M35 error two wire boiler wiring C wire meaning
OBSERVED
Google ↗
AI Mode ↗
—Other / navigational——1x
of 1