controls24/7 Emergency Service

VFD Repair & Service

Keep your paint booth fans running efficiently with

Function

Controls motor speed by varying electrical frequency, enabling precise airflow control and energy savings

Location

Inside main control panel or separate VFD enclosure

Typical Lifespan

10-15 years; capacitors may need replacement sooner

Emergency Service Get Service Quote

Service Options

Repair Service

Replacement Service

Preventive Maintenance

24/7 Emergency Available

Signs of Variable Frequency Drive (VFD) Failure

VFD displaying fault codes

Motor not starting or running erratically

VFD making unusual humming or buzzing

Overheating warnings or shutdowns

Fan not reaching proper speed

Keypad/display not responding

Intermittent motor operation

What Causes Variable Frequency Drive (VFD) Failure

Understanding the root cause helps determine whether repair or replacement is the best option.

Power Quality Issues

common

Voltage spikes, sags, or harmonics damaging VFD components.

Overheating

common

Inadequate cooling or dirty filters causing thermal shutdown.

Capacitor Failure

occasional

DC bus capacitors degrading with age, common in older VFDs.

Motor Issues

occasional

Motor problems causing VFD to fault on overcurrent or ground fault.

Control Board Failure

occasional

Main control board failure requiring replacement.

Repair vs. Replace Decision Guide

Repair When...

Cooling fans need replacement
Capacitors can be replaced
Programming needs correction
Control board is available

Replace When...

VFD is obsolete with no parts available
Multiple component failures
Upgrading to more efficient drive
Adding features like networking
Motor size has changed

Cost Comparison

Cooling fan replacement $100-300. Capacitor service $500-1,500. New VFD $1,000-5,000+ depending on size.

Lifespan Considerations

VFDs in clean, cool environments last longer. Replace proactively after 12-15 years.

Brands Using This Component

We service variable frequency drive (vfd) across all major paint booth brands.

ABB

ACS310ACS355ACS580

Allen-Bradley

PowerFlex 525PowerFlex 755

Siemens

G120V20

Yaskawa

GA500GA700

Danfoss

VLT HVACVLT AutomationDrive

Our Variable Frequency Drive (VFD) Service Process

Fault Analysis

Read fault history and diagnose root cause of VFD problems.

Visual Inspection

Inspect for visible damage, overheating, or contamination.

Component Testing

Test DC bus, capacitors, IGBTs, and control circuits.

Repair or Replace

Replace failed components or install new VFD.

Programming & Commissioning

Configure parameters for proper motor and airflow control.

Variable Frequency Drive (VFD) Service FAQ

Common questions about variable frequency drive (vfd) repair and replacement

A VFD controls fan motor speed by adjusting electrical frequency. This allows precise airflow control, soft starting that extends motor life, and significant energy savings by reducing speed during low-demand periods instead of running full speed constantly.

Common causes include power quality problems, overheating from dirty filters or inadequate ventilation, motor issues, and aging components. The fault code provides clues—WERCS can diagnose the root cause and prevent recurring faults.

Yes, significantly. Fan power varies with the cube of speed—running at 80% speed uses about half the power of 100% speed. VFDs also provide soft starting and precise control. Payback on VFD installation is often 1-3 years.

Have a question not answered here?

Call us at (877) 489-3727

Related Components

Plc Programming Explosion Proof Motor Control Panel Upgrade

Related Troubleshooting

Vfd Fault Motor Failure Airflow Issues

Need Variable Frequency Drive (VFD) Service?

WERCS technicians have the expertise and parts to get your variable frequency drive (vfd) working properly. 24/7 emergency service available.

Call (877) 489-3727 Request Service Quote