Pressure Switch Service & Adjustment
Reliable pressure monitoring for filter condition,
Function
Monitors air pressure or pressure differential to detect filter loading, prove airflow, or control system operation
Location
Mounted near filters (filter status), on ductwork (airflow proving), or on equipment enclosures
Typical Lifespan
10-15 years depending on environment
Service Options
Signs of Pressure Switch/Differential Pressure Switch Failure
What Causes Pressure Switch/Differential Pressure Switch Failure
Understanding the root cause helps determine whether repair or replacement is the best option.
Diaphragm Wear
commonRubber diaphragm has stiffened, cracked, or developed leaks over time.
Contact Wear
occasionalElectrical contacts pitted or corroded from repeated cycling.
Tubing Issues
occasionalPressure sensing tubing clogged, kinked, or disconnected.
Setpoint Drift
occasionalAdjustment mechanism has drifted from vibration or wear.
Environmental Damage
rareTemperature extremes, moisture, or corrosive atmosphere affecting components.
Repair vs. Replace Decision Guide
Repair When...
- Tubing can be cleared or replaced
- Setpoint can be readjusted to spec
- Contacts can be cleaned and restored
- Minor diaphragm issues on accessible switches
Replace When...
- Diaphragm is torn or severely degraded
- Switch cannot hold adjustment
- Contacts are severely pitted
- Switch is obsolete or calibration not possible
- Upgrading to electronic pressure transmitter
Cost Comparison
Adjustment and service $100-200. Switch replacement $150-500 depending on type and pressure range.
Lifespan Considerations
Pressure switches are relatively inexpensive and reliable. When troublesome, replacement is often more cost-effective than repeated service.
Brands Using This Component
We service pressure switch/differential pressure switch across all major paint booth brands.
Dwyer Instruments
Honeywell
Cleveland Controls
Antunes Controls
Johnson Controls
Air Monitor
Our Pressure Switch/Differential Pressure Switch Service Process
Visual Inspection
Check switch, tubing, and connections for visible damage or issues.
Tubing Verification
Verify pressure tubing is clear, properly connected, and leak-free.
Setpoint Verification
Apply known pressure and verify switch actuates at correct setpoint.
Contact Testing
Test electrical continuity through switch contacts in both states.
Adjustment or Replace
Adjust setpoint if needed or replace switch if it cannot be calibrated.
Pressure Switch/Differential Pressure Switch Service FAQ
Common questions about pressure switch/differential pressure switch repair and replacement
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WERCS technicians have the expertise and parts to get your pressure switch/differential pressure switch working properly.