LENNOX ICOMFORT S30 / S40 / 10F81 Error
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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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CHECK PRICE |
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15%
CONF
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Secondary Circuit / Wiring Check
Inspect wiring harness.
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CHECK PRICE |
DIY Repair Guide
Watch exactly how to replace the Lennox iComfort S40 Smart Thermostat.