A/C LOW-PRESSURE SWITCH — PROTECTING YOUR COOLING SYSTEM
A/C LOW-PRESSURE SWITCH — PROTECTING YOUR COOLING SYSTEM
The low-pressure switch is an important safety device that monitors refrigerant pressure on the low side of your A/C system. If the pressure drops below a safe level, the switch can shut the system down to help protect the compressor and other major components.
✔ Monitors low-side refrigerant pressure
✔ Helps protect the compressor
✔ Prevents operation under unsafe conditions
✔ Helps detect possible refrigerant problems
✔ Reduces unnecessary system strain
✔ Supports reliable cooling performance
⚠️ Low refrigerant pressure may be caused by a refrigerant leak, restricted airflow, a dirty filter, a frozen evaporator coil, or a refrigerant restriction.
Common warning signs include:
• A/C repeatedly shutting off
• Warm or inconsistent airflow
• Ice forming on the refrigerant line or evaporator coil
• System short-cycling
• Weak cooling performance
• Compressor failing to start
Never bypass a low-pressure switch. If it shuts the system down, a professional technician should inspect the system and correct the underlying problem.
Protect your compressor and cooling system with professional A/C service.
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