KaVo 25 LPR Overheating and Other Warning Signs: What to Check and When to Stop

If your GENTLEpower LUX 25 LPR feels warm, stop using it. KaVo warns that damaged or poorly maintained electric handpieces can generate frictional heat capable of causing serious burns. The checks below help you work out what else might be wrong, but heat alone is reason enough to take the attachment out of service.

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Heat: Why It Happens and What to Do

Possible causes

Worn bearings, gears or chuck parts.
Missed lubrication before sterilization.
Pressing the chuck release button while the attachment is turning, which KaVo warns against.

What to do

Stop immediately, tag the attachment and send it for inspection. Do not try to finish the procedure with it.

→ Warm head? Start your 25 LPR repair with Repair.Dental today.

Attachment or Motor? The Swap Test

Fit a known-good attachment to the same motor. If it runs normally, the 25 LPR is the likely fault.
Fit the 25 LPR to another motor. If the problem disappears, check the original motor or its control.

Remember that KaVo states its electric motors must not be lubricated. Oil sprayed into a motor can cause problems that look like attachment faults.

Noise, Clicking or Vibration

In a geared attachment, a rising whine usually points to bearing wear, and clicking or grinding usually points to gear wear. Try a new bur first. If the noise continues, stop using the attachment.

Bur Slipping or Sticking

Seat a new bur fully and pull firmly. KaVo recommends a weekly chuck spray for speed-increasing attachments and weekly chuck cleaning in general, so check whether that step has been missed. If the bur still slips, stop using the attachment.

Safe Checks Summary

Safe 25 LPR checks

Check	How	If it fails
Heat	Short free run, touch head	Stop use, send for repair
Swap test	Known-good attachment and motor	Identifies the faulty part
New bur	Replace bur, recheck noise	Internal wear
Grip	Seat new bur, pull firmly	Chuck service, stop use
Visual	Inspect for cracks or discolouration	Stop use

Stop-Use Signals

Any warmth at the head or button cap.
Bur slipping or releasing during use.
Clicking, grinding or a sudden change in sound.
Cracks, dents or discolouration.
A burning smell.

Problems Right After Sterilization

Stiffness or noise straight after the autoclave often means the attachment was not lubricated beforehand, or condensation is still inside. KaVo recommends lubricating before every sterilization and storing handpieces upright. If it still runs rough after correct care, have it inspected.

Spray and Light Problems

Weak spray: check the unit water supply and the motor's coolant settings, then try another attachment.
Dim light: clean the light exit, check the motor LED, and make sure the attachment is fully seated.

Recording a Heat Incident

If the attachment warms up during treatment, take it out of service, inform the clinician in charge and record the date, chair and what was noticed. That record supports your internal incident procedures and helps the technician.

Frequently Asked Questions

Is a slightly warm 25 LPR safe to use?

No. KaVo warns that heat from damaged electric handpieces can cause serious burns. Stop using it.

Can the motor make the attachment seem faulty?

Yes. A swap test with a known-good motor shows which part is at fault.

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KaVo 25 LPR Overheating? Stop and Check | Repair.Dental