IR P185WIR & XP185WIR Troubleshooting: Compressor Will Not Unload
If your Ingersoll Rand P185WIR or XP185WIR refuses to unload after reaching pressure, it’s not just annoying—it can cause extra wear on your engine and your compressor system. Here’s how to diagnose the issue and get it working the way it should.
What Causes a Compressor to Stay Loaded?
- Leaks in regulator piping: If pressure is bleeding off somewhere in the regulator circuit, the unit may never get the signal to unload.
- Incorrect pressure regulator adjustment: If the settings are wrong, the system won't know when to switch from loaded to unloaded mode.
- Malfunctioning pressure regulator: A worn or defective regulator can prevent unloading even if it’s set correctly.
- Malfunctioning inlet unloader or butterfly valve: If the valve that controls air intake is stuck or broken, the compressor can’t properly unload.
- Ice in regulation lines or orifices: In cold weather, moisture can freeze inside small regulation passages, locking up the system.
Recommended Fixes
- Inspect regulator piping for leaks—listen for hissing or spray soapy water on joints to spot bubbles.
- Verify and adjust the pressure regulator setting to match manufacturer specifications.
- Test or replace a malfunctioning pressure regulator if adjustment alone doesn’t fix the issue.
- Inspect and clean or replace the inlet unloader/butterfly valve assembly.
- In freezing conditions, check regulation lines and orifices for ice buildup. Install a moisture separator if icing is a recurring problem.
Wrap-Up
If your compressor stays loaded when it shouldn’t, it puts unnecessary strain on your system and burns extra fuel. Fixing leaks, valves, or frozen lines now will save you bigger headaches (and costs) down the line.