Low Pressure Cutoff Switch Hvac

Some vehicles are equipped with just a high pressure switch while others have both.

Low pressure cutoff switch hvac.

This is because most ac systems will automatically cut off for periods of time usually when the cabin temperature reaches what you have entered into the ac settings. Universal mount single pressure controls. This switch is crucial for proper a c performance. Use with hvac compressors to protect against loss of refrigerant or from excessive system pressure.

What you will notice with this symptom though is that this cut off will happen far. Air conditioning pressure switches are designed to protect the a c system against pressure that is too high or too low. One of my walk in boxes is controlled by a temp gauge that operates a solenoid to close the liquid line and drop the suction pressure to trip the low pressure cut off switch. The compressor is external and i did not notice until recently that the cut off switch was not opening on pressure drop and the compressor was running constantly.

Again this is a symptom that should be easy to pick up if you are used to the way that your ac system operates. There is a high side pressure switch and low side pressure switch and they both serve to monitor the system for pressure faults that can damage the compressor. Incorrect pressure can damage the compressor hoses and other a c system components. When the pressure is too low the compressor risks damage due to running with low oil.

What ac pressure switch does. Low refrigeration pressure switches the low pressure switch is typically an automatic reset switch that will reset itself when the pressure on the low pressure side of the refrigeration systems returns to normal or above the setting on the switch. The a c pressure switch is mounted on both the high and low sides of your a c. One of the big examples of this weird behavior is making the ac switch on and off over and over often in very quick succession.

The switch is a texas instruments ps80 02 f1009 015 005. When the pressure in your a c rises or lowers too much this switch turns off the compressor to protect it and the rest of the system from damage. Ac not blowing cold in this video we will explain what the a c pressure switch is for and how a bad faulty ac pressure switch m.