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Lennox Heat Pump Pressure Switch 15M18
This part 15M18 is compatible with:
- Product Type:
- Heat Pump
- Brands:
- Lennox
Pressure Switch Customer Reviews
Common Problems Fixed by the Pressure Switch
Based on customer reports and repair data, this part commonly fixes these issues:
Heat pump not cooling
Heat pump not heating
Heat pump compressor won't run
About the Pressure Switch
A pressure switch is a safety device used to help prevent component and system failures. There are basically three types of pressure switches used in central air conditioning and heat pump applications: High Limit, Low Limit, and Ambient Temperature. Depending on the model, you may have one or more of these or none. The pressure switch(es) can be checked with a multimeter, referencing the wiring diagram for the circuit locations. Note: If a pressure switch needs to be replaced the refrigerant will need to be removed, requiring a qualified technician.
Alternative Part Number(s)
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