LENNOX ICOMFORT S30 / S40 / 10F81 Error
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
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85%
CONF
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Lennox iComfort S40 Smart Thermostat
The iComfort system utilizes a proprietary digital communication protocol rather than standard 24V switching. A generic 'Error' usually signifies a 'Loss of Communication' (Error 31 or E201) caused by a hardware failure in the thermostat's internal logic board or transceiver. Upgrading to the S40 assembly resolves these internal board failures and provides improved hardware stability over the discontinued 10F81 and E30 models.
SKU: 22U49
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VIEW ON AMAZON
#CommissionsEarned
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15%
CONF
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Secondary Circuit / Wiring Check
Inspect wiring harness.
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VIEW ON AMAZON
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the Lennox iComfort S40 Smart Thermostat.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.