LENNOX SL18XC1 Running No Cold Air
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
Dual Run Capacitor
The capacitor provides the phase-shift torque required to start the compressor motor. In the SL18XC1, if the hermetic side of the capacitor fails due to thermal degradation, the fan will continue to spin while the compressor remains dormant. This results in the system 'running' without any actual heat transfer occurring.
|
VIEW ON AMAZON
#CommissionsEarned
|
|
10%
CONF
|
Definite Purpose Contactor
The contactor is a high-current relay that closes the circuit to the compressor and fan motor. Over time, the contact points can become pitted or carbon-coated, creating high resistance that prevents the compressor from drawing enough amperage to start, even if the fan is receiving power.
|
VIEW ON AMAZON
#CommissionsEarned
|
|
5%
CONF
|
Evaporator Coil
If the unit and compressor are both running but no cooling is produced, a total loss of refrigerant is likely. This is typically caused by formicary corrosion creating pinhole leaks in the indoor evaporator coil, which prevents the system from undergoing the necessary evaporation phase change to absorb heat.
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the Dual Run Capacitor.
// 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.