Campbell Hausfeld CW218700AV Air Compressor Pressure Switch

The Campbell Hausfeld CW218700AV pressure switch is designed to control compressor cut-in and cut-out pressure, ensuring safe and efficient air tank operation. When this switch begins to malfunction, it can directly affect compressor performance, cycling behavior, and air delivery consistency.

Common Symptoms for This Part:

• Air compressor fails to start or stop at correct pressure levels

• Inconsistent tank pressure regulation

• Continuous air leakage from switch area

• Compressor short cycling or running too frequently

• Switch not responding or feeling “stuck” internally

Compressor Won’t Start Due to Pressure Switch Failure

Quick Check: Confirm power supply and check if switch lever or mechanism engages.

Fix Suggestion: Replace or reset the CW218700AV pressure switch if internal contacts are worn or stuck.

Prevention Tip: Avoid moisture buildup around the switch housing and ensure proper enclosure sealing.

Irregular Cut-In/Cut-Out Pressure Settings

Quick Check: Observe if compressor starts/stops outside normal PSI range.

Fix Suggestion: Adjust pressure settings carefully or replace the switch if calibration is lost.

Prevention Tip: Do not frequently tamper with adjustment screws without pressure gauge monitoring.

Air Leaking from Pressure Switch Unloader Port

Quick Check: Listen for continuous air escaping when compressor is idle.

Fix Suggestion: Inspect diaphragm or unloader valve inside CW218700AV and replace if worn.

Prevention Tip: Regularly drain tank moisture to reduce internal corrosion.

Rapid Cycling or Short Cycling

Quick Check: Check if compressor turns on/off too frequently under low air demand.

Fix Suggestion: Replace faulty pressure switch contacts causing inaccurate sensing.

Prevention Tip: Ensure correct tank size and avoid undersized compressor usage for high-demand tools.

Intermittent Switch Response or Delayed Activation

Quick Check: Test if compressor starts after multiple attempts.

Fix Suggestion: Clean terminals or replace the CW218700AV switch if electrical contacts are degraded.

Prevention Tip: Keep electrical connections tight and free from oxidation.

Customer Experience: Many users report that replacing the CW218700AV pressure switch restores stable compressor cycling and eliminates erratic start/stop behavior. One customer noted that after installation, their unit returned to smooth operation with consistent PSI control, no more random shutoffs during use.