Troubleshooting Pressure Switch Issues

Like any component, pressure switches can fail. Common symptoms include:

System not starting or cycling frequently

Error codes indicating low or high pressure

Inconsistent temperature regulation

Causes might include a stuck diaphragm, incorrect pressure settings, dirty sensors, or actual pressure problems within the system. Technicians often use multimeters and pressure gauges to diagnose issues.

Conclusion
Pressure switches might be small, but they serve as vital protectors and controllers in HVAC systems. By monitoring system pressures and responding to deviations, they ensure safe, efficient, and reliable operation. Whether you’re a facility manager, technician, or HVAC enthusiast, understanding how these devices work—and why they matter—can help keep systems running smoothly and safely.