Gas Heater Not Working
Singapore's trusted LGSW-supervised specialists for diagnosing and fixing gas water heaters that won't ignite, won't heat, or keep shutting off — with a full portfolio of verified repair and replacement cases.
Never force-start a faulty gas heater. Repeated failed ignitions can allow gas to accumulate in enclosed spaces. Get a licensed technician to inspect it first.
Common Reasons Why a Gas Heater Stops Working
A gas water heater may stop working due to electrical supply issues, gas supply interruptions, communication faults, or failed internal components. Use this checklist to identify possible causes before arranging an inspection.
Power supply failure or MCB/isolation switch turned off
Communication cable disconnected or loose connection issue
No gas supply reaching the heater unit
Gas valve is closed or not turned on properly
No gas meter supply available to the property
Internal heater component failure such as PCB, ignitor, or sensors
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Should You Repair It or Replace It?
Not every heater problem means you need a full replacement. Here’s a simple homeowner guide based on heater age, condition, and the type of fault detected.
Consider Repair
- Heater is under 5 years old
- Only a single fault detected
- No visible corrosion or leaking
- Parts are still in good condition
- Fault is isolated and repairable
- Water heating performance was previously stable
Consider Replacement
- Heater is over 8–10 years old
- Recurring faults keep happening
- Internal corrosion or leaking found
- Heat exchanger or tank is deteriorating
- Repair costs are becoming excessive
- Safety and reliability are a concern
What to Do When There Is No Display on the Control Panel
Gas heaters with no display on the control panel may indicate electrical faults, PCB failure, power supply issues, or internal component damage. Learn the common warning signs, possible causes, and when professional inspection may be necessary for safe operation.
Gas heater not working — or not sure what's wrong?
We find the fault. You get hot water back.
OUR PROCESS
Homeone Safety Standard
When you book a CO inspection with us, we follow a strict compliance workflow — not a visual check, not a guess. Every step is documented, licensed, and accountable.
Gas Heater Not Working – FAQ
Learn the common reasons why a gas water heater may stop working, warning signs to look out for, and when to arrange a proper inspection or replacement in Singapore.
Why is my gas heater not working?
A gas heater may stop working due to ignition failure, faulty internal components, gas supply issues, water flow problems, or ageing parts inside the heater.
Why is there no hot water from my gas heater?
No hot water may happen when the burner cannot ignite properly, the heater cannot detect water flow, or important heating components are worn out or damaged.
Why does my gas heater keep shutting down?
Repeated shutdowns can be caused by overheating protection, poor ventilation, unstable combustion, blocked exhaust, or internal sensor faults.
Can an old gas heater suddenly stop working?
Yes. Older gas heaters may develop issues such as rust, leaking components, ignition failure, or worn heat exchangers after many years of use.
What are common warning signs before a gas heater fails?
Common signs include inconsistent water temperature, unusual noises, weak flame, burning smell, water leakage, error codes, or difficulty starting the heater.
Should I repair or replace a faulty gas heater?
It depends on the heater’s age, condition, repair cost, and overall safety. Older units with multiple faults are often more practical to replace after inspection.
Is it safe to continue using a gas heater that is malfunctioning?
A malfunctioning gas heater should not be ignored. Continued use may lead to unsafe operation, poor combustion, water leakage, or further internal damage.
Who should inspect a gas heater that is not working?
Gas heater issues should be checked by a trained technician under Licensed Gas Service Worker (LGSW) supervision to ensure proper diagnosis and safe operation.
Book a CO Inspection Today
Same-day bookings available (depends on slot availability). Our licensed team will inspect, test, and report — with no obligation to replace unless it's genuinely needed.