Introduction
Laboratory equipment does not always perform as expected.
An instrument may fail to power on, display an error message, produce unusual readings, overheat, vibrate excessively, leak or stop during operation.
When this happens, the first response should not be guesswork.
Effective troubleshooting is a systematic process of identifying symptoms, checking likely causes and taking appropriate corrective action within one’s competence and authorization.
Good troubleshooting can help laboratories reduce unnecessary downtime, protect equipment, identify recurring problems and determine when specialist assistance is required.
This guide introduces a practical approach to laboratory equipment troubleshooting, from identifying symptoms to documenting faults and returning equipment to service.
1. What Is Laboratory Equipment Troubleshooting?
Laboratory equipment troubleshooting is the process of investigating equipment problems to determine their likely causes and identify an appropriate corrective action.
It involves asking questions such as:
- What exactly is wrong?
- When did the problem begin?
- What changed before the problem occurred?
- Is the problem repeatable?
- Are there obvious external causes?
- Does the manufacturer’s troubleshooting guidance identify the symptom?
- Can the problem be safely addressed at the user level?
Troubleshooting should be based on evidence rather than assumptions.
2. Why Is Systematic Troubleshooting Important?
Randomly changing components, settings or operating conditions can create additional problems.
Poor troubleshooting can:
- Make the original problem worse
- Damage equipment
- Create additional faults
- Affect stored data
- Create safety risks
- Make the original fault more difficult to identify
- Increase repair costs
- Cause unnecessary equipment downtime
A structured approach helps laboratory personnel investigate problems more consistently.
A useful troubleshooting sequence is:
Observe → Define → Check → Test → Correct → Verify → Document
The exact process will depend on the equipment and the laboratory’s procedures.
3. Observe the Equipment Symptoms
The first step is to observe what the equipment is doing.
Do not immediately begin changing settings or replacing components.
Record the symptoms.
Examples include:
- No power
- Error message
- Unusual noise
- Excessive vibration
- Incorrect or unexpected readings
- Slow operation
- Unexpected temperature
- Leakage
- Overheating
- Failure during startup
- Unexpected shutdown
The more accurately the symptom is described, the easier it may be to identify possible causes.
4. Define the Problem Clearly
A vague description makes troubleshooting difficult.
For example:
“The machine is bad.”
is not a useful fault description.
A more useful description might be:
“The instrument powers on, but the display shows an error during initialization.”
Another example is:
“The incubator is faulty.”
which could instead be documented as:
“The incubator powers on, but the displayed temperature does not reach the set temperature.”
Specific descriptions provide useful information for the person investigating the problem.
5. Check Simple Causes First
Depending on the equipment and the authorized procedure, simple external factors should normally be considered before assuming that an internal component has failed.
Possible checks may include:
- Power supply
- Power switch
- Connections
- Sample loading
- Consumables
- Operating settings
- Environmental conditions
- Door or lid position
- Required accessories
- Equipment status indicators
For example, an instrument that appears not to work may simply have no power supply or may not be correctly connected.
Simple causes should be checked using approved procedures.
6. Common Laboratory Equipment Problems
Laboratory equipment can develop many different types of faults.
The following examples illustrate common troubleshooting situations.
Equipment Will Not Power On
Possible causes can include:
- No power supply
- Power switch problem
- Damaged power cable
- Fuse or protection device
- Internal electrical fault
Only perform checks appropriate to your training and authorization.
Electrical equipment should not be opened or internally tested without appropriate competence, authorization and safety procedures.
Equipment Produces an Error Message
Record the exact error message or code.
Then consult:
- User manual
- Manufacturer troubleshooting guide
- Laboratory SOP
- Equipment service documentation
- Authorized technical support
Avoid guessing what an unfamiliar error code means.
Equipment Vibrates Excessively
This can occur with equipment such as centrifuges, mixers and some other rotating instruments.
Possible causes depend on the instrument and may include:
- Incorrect loading
- Imbalance
- Loose components
- Mechanical problems
- Incorrect installation or positioning
Follow the equipment-specific troubleshooting procedure.
Equipment Produces Unexpected Readings
Unexpected results can have several possible causes.
Consider:
- Sample preparation
- Reagents
- User technique
- Equipment condition
- Calibration or verification status
- Environmental conditions
- Instrument settings
Do not automatically assume that the instrument is defective.
7. Troubleshooting by Symptom
A symptom-based approach can help organize the initial investigation.
| Symptom | Initial Considerations |
| No power | Power supply, switch, cable, protection devices |
| Error message | Exact code, manual, operating conditions |
| Excessive vibration | Loading, balance, positioning, mechanical condition |
| Unexpected result | Sample, procedure, calibration/verification, equipment |
| Overheating | Ventilation, operating conditions, cooling system |
| Leakage | Connections, seals, containers, fluid path |
| Unusual noise | Moving parts, obstruction, mechanical condition |
| Unexpected shutdown | Power supply, alarms, protection system, operating conditions |
These are starting points, not universal diagnoses.
The manufacturer’s instructions and laboratory procedures should take priority over generic troubleshooting assumptions.
8. Use the Manufacturer’s Documentation
Manufacturer documentation is an important troubleshooting resource.
Depending on the equipment, relevant documents may include:
- User manual
- Installation manual
- Service manual
- Troubleshooting guide
- Maintenance instructions
- Error-code reference
- Technical bulletins
- Software documentation
The documentation can help determine what checks are appropriate for the particular instrument.
Different models of apparently similar equipment may have very different troubleshooting procedures.
9. Follow the Laboratory SOP
Manufacturer instructions are not the only source of guidance.
The laboratory may also have an approved SOP describing:
- Equipment operation
- Routine checks
- Cleaning
- Maintenance
- Fault reporting
- Equipment isolation
- Escalation
- Return-to-service requirements
Laboratory personnel should follow the applicable procedure rather than creating an unofficial repair process.
10. Know Your Limits
Not every laboratory professional is authorized to repair equipment internally.
There is an important difference between user-level troubleshooting and technical repair.
User-Level Troubleshooting
Depending on the laboratory’s procedures, this may include:
- Checking connections
- Confirming operating settings
- Checking sample loading
- Reviewing an error message
- Performing an approved reset
- Checking equipment status indicators
- Carrying out routine cleaning
Technical Repair
This may involve:
- Opening equipment
- Electrical testing
- Component replacement
- Circuit-board repair
- Mechanical adjustment
- Software configuration
- Internal calibration or adjustment
Such activities may require specialist training and authorization.
Knowing when to stop troubleshooting and escalate the problem is itself an important professional skill.
11. Safety Comes First
Troubleshooting should never take priority over safety.
If an instrument presents an immediate hazard:
Stop using it and follow the laboratory’s safety and equipment-isolation procedures.
Examples include:
- Smoke
- Burning smell
- Electrical arcing
- Exposed electrical conductors
- Dangerous leakage
- Severe mechanical vibration
- Uncontrolled heating
- Unusual chemical release
Do not continue operating equipment simply to obtain more information.
Where applicable, isolate the equipment according to the laboratory’s approved procedure and notify the appropriate responsible person.
12. Troubleshooting and Maintenance Records
Important troubleshooting activities should be documented.
A fault record may include:
- Equipment identification
- Equipment serial or asset number
- Date and time
- Reported symptom
- Error code
- Initial checks
- Action taken
- Result
- Person involved
- Further action required
- Equipment status
Good documentation creates a history of equipment performance.
It can also help maintenance personnel identify recurring problems.
13. Recurring Equipment Faults
Suppose an instrument develops the same fault several times.
Instead of repeatedly resetting the instrument, investigate the pattern.
Ask:
- Is the same error occurring?
- Is it happening under similar conditions?
- Has the same component been replaced repeatedly?
- Is the environment contributing to the problem?
- Is the equipment being used according to its intended purpose?
- Does the equipment require a more detailed service assessment?
Recurring faults may indicate that the underlying cause has not been resolved.
A temporary correction is not necessarily the same as eliminating the root cause.
14. Troubleshooting and Root-Cause Investigation
Troubleshooting identifies and addresses equipment symptoms.
For recurring or significant problems, a deeper investigation may be required to determine the underlying cause.
For example:
Symptom: Instrument repeatedly stops during operation.
Possible immediate response:
- Check the error message.
- Follow the approved troubleshooting procedure.
- Reset the equipment if authorized.
Further investigation may consider:
- Power supply conditions
- Operating environment
- Equipment loading
- Maintenance history
- Software or configuration
- Component condition
The appropriate level of investigation depends on the equipment, risk and laboratory procedure.
15. Practical Troubleshooting Example: Incubator
Imagine an incubator is not maintaining its expected temperature.
A systematic approach might include:
- Confirm the reported temperature.
- Check the instrument display.
- Review the operating settings.
- Check whether the door is closing properly.
- Review the laboratory’s monitoring records.
- Check for an active alarm or error.
- Follow the manufacturer’s troubleshooting procedure.
- Escalate if the issue cannot be resolved safely.
The exact checks depend on the equipment model and laboratory procedure.
The objective is not simply to make the display show the expected value. The equipment must be demonstrated to be suitable for its intended use before being returned to routine operation.
16. After a Repair or Corrective Action
Equipment should not automatically return to routine use simply because a component has been replaced or an apparent fault has disappeared.
Depending on the equipment and laboratory procedure, appropriate checks may be required before returning the equipment to service.
These may include:
- Functional checks
- Performance verification
- Calibration, where applicable
- Safety checks
- Software or configuration checks
- Review of maintenance records
The equipment status and relevant records should also be updated.
17. Troubleshooting, Maintenance and Calibration
Troubleshooting is closely related to maintenance and calibration, but they are not the same activity.
Troubleshooting investigates a problem.
Maintenance helps preserve or restore equipment condition.
Calibration establishes the relationship between measurement values and applicable reference standards under specified conditions.
A laboratory professional should understand the difference because a troubleshooting action does not automatically prove that equipment remains suitable for measurement.
For more information, see the related Knowledge Tech Hub articles on laboratory equipment maintenance and calibration.
18. Common Laboratory Troubleshooting Mistakes
Several mistakes can make troubleshooting less effective.
Guessing the Cause
A symptom does not always identify the cause.
Changing Multiple Things at Once
Changing several settings or components simultaneously can make it difficult to determine what solved the problem.
Ignoring the Manual
Equipment-specific documentation should normally be consulted.
Continuing to Use Unsafe Equipment
Equipment presenting a safety hazard should be taken out of use according to procedure.
Failing to Document the Fault
Undocumented faults can become recurring problems.
Repairing Beyond Your Authorization
Technical repair should only be performed by appropriately trained and authorized personnel.
Returning Equipment to Service Without Verification
A repaired instrument may require appropriate checks before routine use.
19. Developing Good Troubleshooting Skills
Laboratory professionals can improve troubleshooting skills through:
- Equipment training
- Manufacturer training
- Laboratory SOPs
- Maintenance records
- Supervised practical experience
- Fault-reporting exercises
- Equipment manuals
- Technical documentation
- Continuing professional development
A good troubleshooting mindset is based on observation, evidence and controlled action.
20. Practical Laboratory Equipment Troubleshooting Checklist
Before troubleshooting:
- Is the equipment safe to inspect?
- What exactly is the reported problem?
- What error message or code is displayed?
- When did the problem begin?
- What happened immediately before the problem?
- Is there an approved troubleshooting procedure?
- Have simple external causes been checked?
- Am I authorized to perform the proposed check?
- Does the equipment need to be isolated?
- Does the problem require specialist assistance?
After troubleshooting:
- Was the fault resolved?
- Was appropriate verification performed?
- Is the equipment safe and suitable for use?
- Was the equipment status updated?
- Was the fault documented?
- Is further maintenance or service required?
21. When Should You Call a Qualified Service Professional?
Professional assistance may be appropriate when:
- The problem involves internal electrical systems.
- The equipment requires component replacement.
- The fault cannot be resolved using approved user-level procedures.
- The equipment requires specialist adjustment.
- A recurring fault has not been resolved.
- The equipment requires specialized software or configuration.
- Safety may be compromised.
- The laboratory does not have the required competence or authorization.
Knowing when to escalate is an important part of responsible equipment management.
22. FAQs
What is laboratory equipment troubleshooting?
Laboratory equipment troubleshooting is the systematic process of identifying equipment symptoms, investigating possible causes and taking an appropriate corrective action.
Should I open laboratory equipment when troubleshooting?
Only if you are appropriately trained, authorized and following an applicable procedure. Many equipment faults should be referred to qualified service personnel.
What should I do when an instrument displays an error code?
Record the exact code and consult the applicable manufacturer documentation and laboratory SOP. Do not guess the meaning of the code.
Does troubleshooting mean repairing the equipment?
No. Troubleshooting is the process of investigating a problem. Repair may be one possible corrective action and may require specialist competence.
What should I do if equipment is unsafe?
Stop using it and follow the laboratory’s approved safety, isolation and fault-reporting procedures.
Why should troubleshooting be documented?
Documentation provides a history of equipment faults, actions and outcomes. It can also help identify recurring problems and support maintenance planning.
Can an equipment fault affect laboratory results?
Yes. Equipment problems can affect performance and measurements. Where appropriate, the laboratory should assess whether affected results or activities require further review according to its quality procedures.
How can laboratory professionals improve troubleshooting skills?
They can develop troubleshooting skills through equipment training, manufacturer documentation, SOPs, supervised practical experience, maintenance records and continuing professional development.
Conclusion
Good laboratory equipment troubleshooting is based on evidence rather than guesswork.
A laboratory professional should learn to recognize symptoms, define problems clearly, perform appropriate checks, follow approved procedures and know when specialist assistance is required.
The objective is not simply to make an instrument operate again. The equipment should be safe, appropriately verified and suitable for its intended use before returning to routine operation.
Good troubleshooting therefore supports equipment reliability, laboratory safety, quality and continuity of laboratory operations.
Knowledge Tech Hub Practical Takeaway
Remember:
Don’t guess. Observe. Check. Verify. Document.
Good troubleshooting protects both people and equipment.
The ability to recognize the limits of your competence and escalate a problem appropriately is just as important as knowing how to perform basic troubleshooting.
Suggested Internal Links
- Laboratory Equipment: Names, Functions and Uses
- How to Use Laboratory Equipment Correctly: A Beginner’s Guide
- Laboratory Equipment Maintenance: A Complete Practical Guide
- Preventive Maintenance for Laboratory Equipment
- Laboratory Equipment Calibration: What Every Laboratory Professional Should Know
- Calibration vs Maintenance: Understanding the Difference
- Laboratory Documentation and Record Keeping
- Common Laboratory Errors and How to Prevent Them
Suggested Call to Action
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References and Further Reading
- Manufacturer equipment user manuals
- Manufacturer troubleshooting and service documentation
- Laboratory equipment maintenance procedures
- Laboratory Standard Operating Procedures (SOPs)
- World Health Organization (WHO) Laboratory Quality Management System resources
- Applicable laboratory safety requirements
- Equipment maintenance and service records