Professional heating guidance for homeowners. Start with basic symptoms first, then add brand, model, or error code information only if available.
Safety Notice:
This tool is for general informational purposes only. Do not open sealed combustion compartments, remove burners, adjust gas pressure, bypass safeties, modify venting, work on electrical wiring, or perform repairs requiring a licensed professional. If you smell gas, suspect carbon monoxide, see fire/smoke, have active water damage, or feel unsafe, leave the area and contact emergency services, your utility/fuel provider, or a qualified contractor.
Step 1 — Basic Diagnostic Questions
These answers drive the main explanation. You do not need to know the brand, model, or error code to use this tool.
Step 2 — Optional Error Code Information
Use this only if the homeowner knows the brand/product/code. If not, leave it blank and the tool will still provide a basic diagnostic.