Pressure Sensor Malfunction Signs: What to Do

Why are pressure sensors important in air conditioners?

Pressure sensors monitor refrigerant pressure inside the AC system. They ensure safe operation by preventing overpressure, compressor overload, or refrigerant leaks. A faulty sensor may shut down the unit or send incorrect signals to the control board.

Common signs of a faulty pressure sensor

• AC unit shuts down or refuses to start
• Error codes on the display (e.g., H3, E6, F5)
• Compressor behaves erratically or becomes noisy
• No cooling or heating despite proper settings
• Refrigerant leak detected, but no pressure change indicated

How to diagnose pressure sensor failure?

Use a manifold gauge set and a multimeter to check sensor function. Look for absence of signal or incorrect readings. Inspect wiring and connectors for damage or corrosion.

What to do if it’s faulty?

Replace the sensor as soon as possible. At Only-Spares, you can buy high- and low-pressure sensors for residential and commercial AC systems with fast delivery across Kyiv and Ukraine.

Supported brands

We stock pressure sensors for Gree, LG, Samsung, Midea, Toshiba, Zanussi, and other popular brands. All products are tested and compatible.