Burner will not ignite
Ranges
Thermador Pro Grand® and Pro Harmony® range diagnostics and repair — ignition, oven heat and control faults.
Reviewed by admin · Last reviewed August 7, 2026
Overview

This practical guide to Ranges explains what Ranges usually means, the safe checks worth trying first, and when specialist repair is the better next step.
Readers looking up Ranges usually want a clear sequence: confirm the symptom, rule out simple causes, then decide whether Ranges needs a technician.
Use this page as a working checklist for Ranges before you order parts or book a visit.
Thermador Pro Grand® and Pro Harmony® range diagnostics and repair — ignition, oven heat and control faults.
What Ranges usually means
In most Thermador appliances, Ranges points to a control, sensor, airflow, or component issue that should be confirmed against the exact model before parts are replaced.
Start with simple owner-safe checks. If the same fault returns quickly, book a diagnosis instead of repeating temporary resets.
Common symptoms with Ranges
Typical signs include interrupted cycles, unusual sounds, error indicators, or performance that no longer matches normal operation.
Likely causes to consider
Restricted airflow, worn seals, blocked filters, failing sensors, and control communication faults are among the most common contributors.
Safe checks before repairing Ranges
Confirm power and door/lid closure, clear obvious blockages, clean accessible filters, and retry one standard cycle after a full power reset.
Avoid opening sealed refrigerant circuits, live terminals, or gas connections. Those steps belong to a trained technician.
When to book a specialist
If Ranges continues after the safe checks above, a specialist can test the exact component path and prevent unnecessary parts swapping.
Browse our appliance repair services or contact the team to book a visit.
You can also review official guidance on the Thermador Support site while you gather model details.
For more troubleshooting notes, see our repair guides.
Ranges FAQs
Why does one burner click but not light?
This usually points to a fouled or failing igniter on that burner. We confirm during diagnosis.
Can I use the range if the oven display shows an error?
The stovetop may still be usable, but book a diagnosis before relying on the oven again.
Extra repair tips
Write down the full model number before ordering parts. Board and sensor revisions can change which part number is correct.
A single power reset can clear a temporary fault, but repeated returns of the same code usually mean a physical cause remains.
Keep vents and filters clear between visits. Restricted airflow often mimics electrical or sensor failures.
If water, burning smells, or sparking are present, stop using the appliance and arrange a professional inspection.
Good documentation of timing, sounds, and cycle stage helps the technician reproduce the fault faster on arrival.
Using original manufacturer parts and correct torque on fasteners reduces repeat calls after a successful repair.
Not every error needs an immediate part replacement. Measurement and inspection should come before guesswork.
Local water hardness, installation clearances, and usage patterns all influence how quickly issues reappear.
In short: treat Ranges as a diagnostic signal, complete the safe checks, and escalate to repair when Ranges persists.
Common symptoms
Not reaching temperature
Uneven flame or heat
Error code on the panel
Unresponsive knobs or controls
Safety first Ranges combine gas and high voltage. Turn off the burner and ventilate the area if you smell gas, and leave internal diagnostics to a technician.
Frequently asked questions
This usually points to a fouled or failing igniter on that burner. We confirm during diagnosis.
The stovetop may still be usable, but book a diagnosis before relying on the oven again.
Tell us what’s wrong — we’ll take it from there
Share a few details and we’ll confirm an appointment. Prefer to talk? Call us and we’ll help right away.
Request your repair
Pick a time that works — we’ll confirm your appointment.