← Gas Tools
TomKat diagnostic workspace

Onsite assistant

Fault finding

Choose your boiler and start with the fault code or the symptom. Work through one check at a time.

A structured thinking aidFor qualified engineers and training use. Follow the manufacturer instructions and safe testing procedures throughout.

TomKat engineer tool

Fault Finding Assistant

Start here

Who is using this tool today?

This helps TomKat understand who uses the assistant. We record this choice and the boiler route, not your name or contact details.

Thinking aid onlyUse current legislation, the exact manufacturer instructions, safe testing procedures and competent judgement.