DanseUSA replacement parts for Makita air compressors including check valves, piston kits, and regulators.

Makita Air Compressor Troubleshooting Guide

If you bought a Makita air compressor, you probably expected set-and-forget reliability. So when it refuses to start on a cold morning… won’t climb past 90 PSI… or keeps running long after it should’ve shut off, it feels unusual and frustrating.

Here’s the thing: most Makita compressor problems trace back to a handful of predictable failure points, especially on machines used across U.S. jobsites.

This guide gives you quick universal checks and model-specific fixes and tips for air compressor repair in the USA.

Quick Diagnosis Checklist

Won’t start: Power supply issue, tripped reset, faulty pressure switch.

  • Try: Plug directly into wall outlet, press reset button, depressurize tank and restart.

Not building pressure: Check valve sticking or leaking, clogged intake filter.

  • Try: Listen for air leaks, check airflow at intake, soap-test fittings.

Runs but never shuts off: Pressure switch not cutting out, unloader stuck.

  • Try: Observe if cut-out PSI is reached, check for constant hissing at unloader line.

Loses pressure quickly: Regulator or drain leak.

  • Try: Soap test regulator, hose ends & drain valve.

Makita MAC2400 - Big-Bore Platform

Common Problems & Fixes:

  • Won’t start → Pressure switch wear; cold-weather thick oil
  • Not building pressure → Dirty intake filter or leaking check valve
  • Runs hot / oil leak → Low crankcase oil or worn piston rings

High-Wear Parts (MAC2400):

  • Check Valve - 409004-E
  • Pressure Switch - 412024-E
  • Regulator Assembly - 410028-E
  • Filter Element - 171006-E
  • Drain Cock - 413008-E
  • Valve Kit: VK2400-E | Ring Kit: RK2400-E

Makita MAC5200 - Portable Contractor Model

Common Problems & Fixes:

  • Tripping breaker → Undersized extension cord or voltage drop
  • Won’t reach 140 PSI → Worn reed valves / clogged filter
  • Air leaks at manifold → Regulator block wear

High-Wear Parts (MAC5200):

  • Check Valve - 409004-E
  • Pressure Switch - 412025-E
  • Regulator / Manifold - 410029-E / 421006-E
  • Reed Valve / Valve Kit - VK5200-E
  • Unloader / Drain Cock - 413008-E

Makita AC001 - Quiet Finish Model

Common Problems & Fixes:

  • Won’t start after cycling → Thermal overload tripped
  • Weak airflow → Check intake/regulator leaks
  • Excess vibration → Loose mounts or worn rubber feet

High-Wear Parts (AC001):

  • Pressure Switch - WS0412006E
  • Check Valve - WS0409017E
  • Regulator - WS0410001E
  • Drain Cock / Safety Valve - 413008-E / WS0407009E
  • Valve Kit - WS00VK001E | Piston Kit - WS00PK001E

Final Takeaway

Most Makita compressor issues come down to valves, switches, regulators, air filters, or internal seals. Match the symptom to the correct replacement part - and you’ll avoid downtime and repeat failures.

DanseUSA supplies: OEM Makita valves, filters, pressure switches, and piston kits for faster repairs and reliable performance. Keep the parts you need in stock - or contact us to confirm model compatibility before your next job.

Back to blog