If you are Googling “Air Compressor Noise”, “Compressor Making Weird Noise” or “Air Compressor Making Rattling Noise”, this post should help clarify why and offer solutions to get your air compressor working quieter again. Not only will it be a nuisance but excessive noise is a sign that something isn’t right with your air compressor and something needs to be repaired. Read through our list of noises your air compressor might be making and get in touch with our air compressor technicians for repair.
There are several different reasons why an air compressor may begin to make a knocking noise, depending on if you have an electric or a gas-powered air compressor. Electric Air Compressor – The most likely reasons for an electric air compressor to develop a knocking sound are:Reed Valves – A reed valve is simply a thin strip of metal that bends to allow air to pass by it, but closes to prevent air from flowing in the reverse direction. Gas-powered Air Compressor – Like the electric version, gas-powered compressors may have problems with reed valves, flywheels, or internal parts in the compressor unit.
All – I recently bought a Snap-on AC580V air compressor off CraigsList. Seems to be a fairly nice compressor, but once I hooked it up at home, I found that there’s a fairly aggressive knock above 40psi. The 5hp Dayton motor turns at 1740rpm, so I anticipated this to be a fairly quiet compressor, but once it reaches around 40psi, it starts knocking fairly aggressively.
Had the same problem with my old Devillbiss 2 stage, check valve where the air goes into the tank was worn out , sounded like a rod knockin. Click to expand…. I’ve heard of people saying this is something that could cause a knocking problem, but looking at mine I just don’t see how. When I have it in my hand, I do the blow, suck on the valve thing, ,and it seems to work as it should, no strange noises let alone a knocking noise.
Valve installation mistakes: Not making sure the valve seat was in good contact with the seat surface, or using the wrong torque and having the valve bolts vibrate loose from the pulsations of a running compressor. Broken valve parts: A ticking or clicking sound will be heard when broken valve parts rattle around in the valve or in the valve port. You can confirm which valve has broken internals by using the screwdriver to listen at each valve cover, or use a thermometer to do a quick comparison of valve temperatures to search for the hottest valve.
SOLVED: Air compressor makes loud knocking nois when – Fixya. Loading…. Oops :Please try again.
I get asked this question periodically, and really, since I cannot see the air compressor running, or hear it while it is making this noise, you don’t identify the compressor or the model, so I really don’t know how to answer the questions. Sanborn has knocking noise at 120 PSI. I just purchased a 60 gallon sanborn compressor, and when the pressure reaches about 120psi I hear a knocking noise. I adjusted the belt tension, turned on the compressor and the noise was gone.
air compressor knocking noise Related Question:
Why is my air compressor knocking?
The Compressor Fan Is Loose If the knocking noise is coming from your AC compressor (the outdoor unit), the fan or one of its blades might be loose. This can cause the fan’s blades to bang into other parts of the compressor, creating a loud knocking noise.
What does a broken compressor sound like?
Loud noises when the compressor is running A worn bearing will produce a high pitched squealing or grinding sound, while a seized bearing will produce a grinding noise or a noticeable belt squeal.
What is compressor knock?
Compressor knockout drums are used to remove liquid droplet carryover in gases and to thus protect the downstream equipment, usually a reciprocating or centrifugal compressor. Most compressor suction knockout drums are arranged vertically.
What could cause a noisy reciprocating compressor?
There are a few factors that make air compressors so loud, but most of the noise can be attributed to friction. Metal hitting or sliding against metal can be loud! Typically, the more moving parts an air compressor has, the louder it will be.
What does a bad AC compressor clutch sound like?
Squealing noise: A loose, dry, or worn A/C compressor belt will cause squealing noise. This noise will be worse during acceleration. Rattling noise: A loose or worn clutch hub or loose compressor mountings bolt will also cause rattling noise from the compressor.
Why is my compressor making a grinding noise?
In compressors, the grinding noise is caused by the pistons that compress the refrigerant gas. They make this noise when the compressor is worn out, which means that you may need the compressor replaced entirely, and sometimes it means that it’s time to replace your entire air conditioning unit.
How much does it cost to replace AC compressor clutch?
Between $610 and $664 is the average cost for an AC compressor clutch replacement. Labor costs are between $184 and $232 while parts are between $426 and $432.
Does a failing AC compressor make noise?
AC compressors are essential components within your unit that can cause serious system problems and indoor discomfort when they malfunction. Not only will a failing compressor create a noisy unit, but faulty compressors can also lead to severe damage.
Can I drive with a bad AC compressor?
You will be fine as long as you don’t need or want AC in your car. If the clutch doesn’t work properly, you will still be able to drive your car.
What happens when AC compressor goes bad?
When your ac compressor fails, less air will come out from the vents, the air coming out could be warm, and the system may continually run without actually cooling your home. This is because refrigerant isn’t pumped through the system, and it can result in a higher power bill.
