292
Moderate
Lennox · HVAC Systems (AC, Furnaces & Heat Pumps)
Outdoor Thermistor Fault
Quick Answer
Error code 292 on your Lennox HVAC Systems (AC, Furnaces & Heat Pumps) means: Outdoor Thermistor Fault. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Locate the outdoor thermistor on the outdoor unit and inspect for physical damage
2
Measure the thermistor resistance and compare to the manufacturer's chart for the current outdoor temperature
3
Check the wiring from the sensor to the outdoor board for breaks or weather damage
4
Clean the sensor connector pins and reseat the connection
5
Replace the outdoor thermistor if readings are out of specification
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Outdoor thermistor
Sensor wire
Weather-resistant wire connectors
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