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Welcome to the About Air Compressors Online Support Community

Here are some of the latest support discussions taking place right now - join in, help where you can, request help when you need it - and be kind!

  1. Help identifying this compressor pump. Cobbled together sometime in the late 1940's to early 1950's. Twin piston, 16" twin 5L…

Air Compressor Just Hums Won’t Start – Why Your Air Compressor Hums But Won’t Start

All of a sudden you have a humming air compressor. What’s with that? If your air compressor hums instead of…

Pneumatic Coupling Explained – Compressed Air Couplers, What Are They, How They Work With Connectors & Buying Guide

Compressed air couplers are part of the compressed air line connection tag team, the couplers, and connectors. There is a…

Harbor Freight Air Compressor Keeps Tripping Thermal Reset Button – Solutions & Causes

A common problem with Harbor Freight air compressors is the Harbor Freight air compressor reset button tripping. This article will…

Can You Leave An Air Compressor Full Of Air? Should you leave air in an idle compressor?

Leaving an air compressor full of compressed air, or knowing whether you can or not is a regularly asked question…