Real ChatGPT answer · index seedH58m7p2JDh8completeHome services and improvement · plumbingcomparison

Our Rheem tankless water heater is showing code 12 for ignition failure and we have no hot water on a freezing Sunday, so what troubleshooting steps can I do right now?

ChatGPTgpt-62 queries11/1/2026
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The searches the AI actually ran for this prompt.

SEED QUERY
Our Rheem tankless water heater is showing code 12 for ignition failure and we have no hot water on a freezing Sunday, so what troubleshooting steps can I do right now?
2 real searches · 1 real-search pass
Rheem tankless water heater error code 12 official manual troubleshooting safetyGoogle ↗
OBSERVEDReason
Rheem tankless water heater error code 12 official troubleshooting flame failure gas supply vent condensateGoogle ↗
OBSERVEDReason

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 (2)
Short factOther / navigationalComparisonConsequenceReason100%DefinitionInstructionYes / no

Classes come from the query-classifier (a local Laya model).

Searches and sources

ChatGPT2 real searches · gpt-6
Rheem tankless water heater error code 12 official manual troubleshooting safety Google ↗
Rheem tankless water heater error code 12 official troubleshooting flame failure gas supply vent condensate Google ↗

Queries

2 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Rheem tankless water heater error code 12 official manual troubleshooting safety
OBSERVED
Google ↗
AI Mode ↗
—Reason——1x
of 1
Rheem tankless water heater error code 12 official troubleshooting flame failure gas supply vent condensate
OBSERVED
Google ↗
AI Mode ↗
—Reason——1x
of 1