Here’s a step-by-step on how to replace the pressure switch on your air compressor. It’s important to ensure your air compressor is empty of pressurized air before replacing the pressure switch. A short video below from Sears PartsDirect shows how to replace a broken pressure switch in an air compressor.
I had to repair my air compressor pressure switch because it was leaking at the diaphragm between the 4 port bases – I didn’t expect any real issues as I could tighten down the 4 bolts and it would be alright for a while. After looking into buying a new pressure switch and learning more about them, I figured I’d just try to fix my existing pressure switch. How to fix an Air Compressor Pressure Switch that’s leaking & has bad electrical contacts.
The pressure switch is designed to activate the compressor motor at a pre-set pressure, and to de-activate the motor once that pressure has been reached. Remove the switch wire from the pressure switch terminal. Reinstall the switch wire to the pressure switch terminal.
how to replace air compressor switch Related Question:
Can I use any pressure switch on my air compressor?
Your compressor is rated for a certain maximum pressure. Your new pressure switch must have either the same pressure rating or higher. Also, be sure to never set the pressure setting higher than the maximum rated pressure of your compressor! Can it handle the electrical load?
Are air compressor pressure switches Universal?
Air Compressor Control Valve LF10A-L4, 4 ports (Female), 125 PSI Compressor Pressure switch,1/4″ Compression Unloader,LF10A Four Port Series. This is a pressure switch, control valve with a single port connection manifold. The switch is a universal pressure switch replacement, convenient to replace the broken one.
How do you bypass the pressure switch on an air compressor?
Simply put a jumper wire across the contacts of the pressure switch. It will then run without stopping. Be sure that the safety valve on the pressure vessle is operating, and large enough to vent the entire capacity of the compressor.
What would cause an air compressor to not turn on?
The first and most obvious thing to do when your compressor won’t start is to make sure that the unit is receiving power. It is always possible that a fuse has been blown or that a breaker has been tripped. If such issues occur regularly, you should have an electrician take a look.
Why is my pressure switch not working?
Start by checking that the well switch located near your pressure tank hasn’t been switched off. Then check the well’s double-pole circuit breaker to see that it hasn’t tripped. If it has, reset it. A breaker that keeps tripping likely means a problem with the well pump, and you’ll need to call a pro for that.
How does a compressor pressure switch work?
When the specified system pressure is reached, a diaphragm inside the pressure switch pushes against a mechanism which forces the electrical contacts apart, breaking the circuit and stopping the motor. At the same time, the pressure relief valve opens and relieves back-pressure caught between the pump and check valve.
What does pressure switch do?
A pressure switch is a device that operates an electrical contact when a preset fluid pressure is reached. The switch makes an electrical contact on either pressure rise or pressure fall from a certain preset pressure level.
What PSI should I set my air compressor?
Most air tools require between 70 and 90 PSI. Any light-to-medium-duty air compressor can easily handle 90 PSI, but you always want the compressor to supply more flow than needed. Pro Tip: Always respect a PSI rating. If you don’t supply enough air volume, the tool won’t operate correctly.
Why does my compressor keep running?
Reciprocating units need time to stop and cool off, or the internals will become damaged. When damage occurs, the compressor can experience valve failures, causing the compressors to run constantly. If your reciprocating compressors are never turning off, you should investigate.
Can an air compressor explode?
Yes, air compressors can blow up. Air compressor explosions are most commonly caused by substantial corrosion of the compressor tank. Excessive condensation leads to corrosion, and you can avoid this outcome by monitoring and servicing the compressor and its auxiliary components.
Can you bypass a low pressure switch?
BYPASSING THE PRESSURE SWITCH IS NOT A REPAIR It is simply an attempt to troubleshoot the furnace by isolating what might be causing the problem. Any attempt to bypass the system should only be done by an HVAC technician with the proper training and test equipment.
