LPS
Heat Siphon
Low Pressure Switch Open
Display shows “LPS”; unit will not stay running.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Low refrigerant charge, Restricted metering device, Failed low‑pressure switch
How to Fix / Troubleshooting
Safety first: Turn off power and do not attempt to bypass safety switches.
- Visual inspection: Look for oil stains indicating leaks and ensure the evaporator coil is clean.
- Technician service: A licensed Heat Siphon technician should check refrigerant pressures and the low‑pressure switch operation. Replace the switch or repair/recharge the system as needed.
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Repair Difficulty
Professional Required
5/5
Required Part
Low Pressure Switch
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