Decision support does not replace a safety assessment
Stop where gas, fixed electrics, fire protection, structural movement, pressurised systems or immediate danger is involved.
KEY DECISION FACTORS
Use evidence, not guesswork
Model number
The model usually narrows compatible parts.
Part markings
Codes on the original component can provide the exact match.
Dimensions
Size, spacing and connection positions matter.
Specification
Voltage, pressure, rating and material must be correct.
INTERACTIVE TOOL
How to Identify a Replacement Part
Tick the statements or items that apply. Progress saves automatically on this device.
Product identification
Original part details
Technical specification
Final checks before ordering
0 items completed
Tick items as you collect or confirm them.
How to use this tool safely Checks before making a repair decision. ⌄
- Do not rely on appearance alone.
- Photograph the rating plate before removing anything.
- Measure in millimetres where possible.
- Record every marking on the original part.
- For safety-critical parts, confirm compatibility with the manufacturer or specialist supplier.
Why this planning step matters How better preparation prevents repeat work. ⌄
Many parts look nearly identical but differ in dimensions, ratings, connectors or software compatibility.
Advanced planning checks Extra information worth collecting. ⌄
- Check exploded diagrams.
- Search by exact model suffix.
- Compare superseded part numbers.
- Check regional voltage and market variants.
- Confirm whether seals or fixings are included.
Useful tools and information Items that make the decision more accurate. ⌄
- Phone camera
- Tape measure or calipers
- Torch
- Notebook
- Manufacturer parts diagram
When to call a professional Conditions that should end basic DIY planning. ⌄
- The part controls gas, combustion or mains safety.
- The part is inside a sealed refrigeration circuit.
- Fire alarm or life-safety equipment is involved.
- A pressure vessel or safety valve is involved.
- Compatibility cannot be verified.
Frequently asked questions Common repair-planning questions. ⌄
Can I order by appearance?
No. Visual similarity is not enough.
What if the old part number is obsolete?
Look for an official superseded number or manufacturer-approved replacement.
Does this worksheet save?
Yes, locally in your browser.