Reyds.Heat pumps · Boilers · Steam

Paulshof · Same-day

Gas Boiler Not Igniting in Paulshof

The boiler attempts to start, clicks or purges, then locks out without lighting. This page covers how we diagnose and repair it on boilers in Paulshof.

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

Paulshof is a high-value residential pocket of Fourways, 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
Paulshof, Johannesburg
Equipment
Boilers
Call
069 268 0988

What we find here

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

How it is confirmed

Diagnostic sequence

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

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.

Do you attend this fault in Paulshof?

Yes. Technicians work out of the central Johannesburg base, which keeps travel time short for northern-suburb call-outs. Paulshof falls inside our core northern-suburb route, so response is normally same-day for loss-of-hot-water call-outs.

Gas Boiler Not Igniting — Paulshof

Paulshof falls inside our core northern-suburb route, so response is normally same-day for loss-of-hot-water call-outs.