Boilers · Same-day

Boiler Flame Failure

The burner lights then loses flame within seconds and locks out.

This fault is normally treated as same-day work because the site has effectively lost hot water, steam or safe operation.

Sites with long, poorly insulated pipework lose more heat in distribution than most owners expect, which reads as a capacity problem at the outlet.

069 268 0988 info@reyds.co.za

Equipment: Boilers
Priority: Same-day
Call: 069 268 0988

What we find

Likely causes

Dirty or cracked flame rod
Failed UV scanner
Poor earth on the flame sensing circuit
Incorrect air/fuel ratio
Fluctuating gas supply pressure

Test sequence

How we diagnose it

Flame signal measurement in microamps
Earth continuity test
Combustion analysis through the firing range
Gas pressure under load

Repair route

Services that resolve this fault

Boiler Repairs

Repairs to gas, diesel, electric and steam boilers across Gauteng.

Boiler Maintenance

Planned boiler servicing, combustion tuning and safety device testing.

Gas Boiler Repairs

Natural gas and LPG boiler repairs, ignition and flame failure faults.

Gas Boiler Maintenance

Annual gas boiler servicing, tightness testing and combustion tuning.

Industrial Boiler Repairs

Heavy-duty boiler plant repairs for factories and processing sites.

Coverage

Attendance by area

Also check

Related faults

Boiler Losing Pressure

System pressure falls and the boiler needs repeated topping up.

Gas Boiler Not Igniting

The boiler attempts to start, clicks or purges, then locks out without lighting.

FAQs

Frequently asked questions

What causes boiler flame failure?

The usual causes are dirty or cracked flame rod, failed uv scanner, poor earth on the flame sensing circuit, incorrect air/fuel ratio. Which one it is can only be confirmed by measurement, not by symptom alone.

How do you diagnose it?

Flame signal measurement in microamps; Earth continuity test; Combustion analysis through the firing range; Gas pressure under load. The readings are recorded so the repair decision is based on data.

Can I keep using the system in the meantime?

No — isolate the plant and call 069 268 0988. Running it in this condition risks further damage or an unsafe situation.

Where do you attend this fault?

Across Johannesburg, Ekurhuleni, West Rand, Midrand, Centurion and Pretoria.

Get boiler flame failure diagnosed

Same-day attendance across Johannesburg, Ekurhuleni, West Rand, Midrand, Centurion and Pretoria.

069 268 0988 Request a quote