🏭 The Hidden Warning Signs Your VFD Is About to Fail (Before It Costs You Thousands)

If you manage a facility, you already know this: VFD failures never happen at a convenient time.

They happen:

• During peak production

• Right before a deadline

• Or late on a Friday when support is hard to reach

And when they do, it’s not just a repair, it’s lost time, lost output, and mounting pressure.

The good news?Most VFD failures don’t come out of nowhere.

They leave clues.

1. Intermittent Fault Codes That “Clear Themselves”

If a drive throws a fault and then resets… it’s easy to ignore.

But in reality, that’s often an early warning.

These “temporary” faults usually point to:

• Voltage fluctuations

• Overheating

• Motor or load inconsistencies

👉 What it means: the system is compensating, for now.

2. Heat You Can’t Explain

Excess heat is one of the fastest ways to shorten a VFD’s lifespan.

Common causes:

• Clogged cooling fans

• Dust buildup

• Poor ventilation

• Aging internal components

👉 If your drives are running hotter than usual, failure may not be far behind.

3. Inconsistent Motor Performance

Notice:

• Speed fluctuations

• Unusual vibrations

• Inconsistent torque

These are often blamed on the motor, but the VFD is frequently the real issue.

👉 The drive may be struggling to regulate output properly.

4. You’re Resetting It More Than You Should

If your team’s “solution” is:

“Just reset it and keep it running…”

That’s not a fix, it’s a delay.

👉 Frequent resets are one of the clearest signs something bigger is coming.

5. Aging Drives with No Monitoring

Many facilities are running drives that are:

• 8–15+ years old

• No longer supported

• Not monitored in real time

Including trusted brands like Yaskawa Electric Corporation

👉 These systems often fail without warning, because no one is watching the warning signs.

6. The Real Cost of Waiting

Most facilities don’t act until failure happens.

But by then, you’re dealing with:

• Emergency service costs

• Expedited parts

• Production downtime

• Stress on your team

And all of it could have been reduced, or avoided.

7. What Smart Facilities Are Doing Instead

Instead of reacting, more teams are:

• Scheduling periodic VFD inspections

• Identifying early warning signs

• Replacing or repairing drives before failure

• Adding basic monitoring to critical systems

It’s not about over-maintenance—it’s about control.

Need a Second Set of Eyes?

At Sartron, we work with facilities every week that are dealing with these exact issues.

Sometimes it’s a quick fix.Sometimes it’s something bigger.

Either way, we can help you figure it out before it turns into downtime.

👉 If you’ve noticed any of these signs, reach out. We’re happy to take a look.