Reyds.Heat pumps · Boilers · Steam

Boilers · Same-day

Gas Boiler Not Igniting

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

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

Where a site runs on borehole water, hardness and iron content shorten service intervals considerably and are worth testing before setting a maintenance plan.

069 268 0988 info@reyds.co.za
Equipment
Boilers
Priority
Same-day
Call
069 268 0988

What we find

Likely causes

  • Failed ignition electrode or transformer
  • No gas supply or closed valve
  • Gas solenoid or valve failure
  • Air pressure switch not proving
  • Blocked flue or condensate trap

Test sequence

How we diagnose it

  • Electrode gap and spark test
  • Gas pressure measurement at the train
  • Air proving switch continuity test
  • Flue and condensate path inspection

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.

Boiler Flame Failure

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

FAQs

Frequently asked questions

What causes gas boiler not igniting?

The usual causes are failed ignition electrode or transformer, no gas supply or closed valve, gas solenoid or valve failure, air pressure switch not proving. Which one it is can only be confirmed by measurement, not by symptom alone.

How do you diagnose it?

Electrode gap and spark test; Gas pressure measurement at the train; Air proving switch continuity test; Flue and condensate path inspection. 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 gas boiler not igniting diagnosed

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

069 268 0988 Request a quote