Dunkeld · Same-day
Boiler Flame Failure in Dunkeld
The burner lights then loses flame within seconds and locks out. This page covers how we diagnose and repair it on boilers in Dunkeld.
This fault is normally treated as same-day work because the site has effectively lost hot water, steam or safe operation.
Dunkeld is a high-value residential pocket of Rosebank, typically with multiple geysers or a heat pump on buffer storage, and in many cases pool or underfloor heating on the same plantroom. Gauteng municipal water is moderately hard, so scale on elements and heat exchangers is the single most common cause of falling performance.
- Area
- Dunkeld, Johannesburg
- Equipment
- Boilers
- Call
- 069 268 0988
What we find here
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
How it is confirmed
Diagnostic sequence
- Flame signal measurement in microamps
- Earth continuity test
- Combustion analysis through the firing range
- Gas pressure under load
Repair route
Repair services in Dunkeld
Boiler Repairs Dunkeld
Repairs to gas, diesel, electric and steam boilers across Gauteng.
Boiler Maintenance Dunkeld
Planned boiler servicing, combustion tuning and safety device testing.
Gas Boiler Repairs Dunkeld
Natural gas and LPG boiler repairs, ignition and flame failure faults.
Industrial Boiler Repairs Dunkeld
Heavy-duty boiler plant repairs for factories and processing sites.
Coverage
Nearby areas
- Boiler Flame Failure Houghton Estate
- Boiler Flame Failure Houghton
- Boiler Flame Failure Houghton Estate Ext
- Boiler Flame Failure Upper Houghton
- Boiler Flame Failure Lower Houghton
- Boiler Flame Failure Killarney
- Boiler Flame Failure Parktown North
- Boiler Flame Failure Parkview
- Boiler Flame Failure Parkview North
- Boiler Flame Failure Westcliff
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.
Do you attend this fault in Dunkeld?
Yes. Technicians work out of the central Johannesburg base, which keeps travel time short for northern-suburb call-outs. Dunkeld falls inside our core northern-suburb route, so response is normally same-day for loss-of-hot-water call-outs.
Boiler Flame Failure — Dunkeld
Dunkeld falls inside our core northern-suburb route, so response is normally same-day for loss-of-hot-water call-outs.