Gas geyser troubleshooting
Most gas geyser faults come down to a handful of causes: no gas or low pressure, a pilot that will not stay lit, a failed thermostat or thermocouple, sediment in the tank, or a leak. Start with the symptom below, and always stop and call a technician if you smell gas.
Start with the symptom
| Symptom | First thing to check |
|---|---|
| No hot water, pilot out | Was there a gas cut? Relight, or see pilot guides |
| Pilot lit, water lukewarm | Thermostat setting, sediment, burner |
| Will not light at all | Gas valve open, igniter spark, air in line |
| No spark from the button | Piezo igniter and wire |
| Water under the geyser | Relief valve, fittings, then the tank |
Troubleshooting guides
Geyser not heating
Why a gas geyser is not heating or the water is only lukewarm: pilot out, low gas, thermostat, sediment, burner or mixing, and how to fix each cause.
Geyser not turning on
Gas geyser not turning on or not working at all? Check gas supply, valves, pilot, igniter, thermocouple and thermostat in order, and know when to call help.
Igniter (piezo) not sparking
Gas geyser lighter or piezo igniter not sparking? Check the electrode gap, wire, connection and button, how to light safely meanwhile, and when to replace it.
Thermostat problems & setting
How to set a gas geyser thermostat for winter and summer, signs of a faulty gas thermostat, repair or replace decisions, and how it works with auto ignition.
Geyser leaking water
Gas geyser leaking water? Tell a relief valve drip or loose fitting from a corroded tank, what to do immediately, and when repair is no longer worth it.
Geyser service & repair
What a gas geyser service should include before winter in Pakistan: pilot jet, thermocouple, burner, flue, anode rod, tank flush and leak checks.
Frequently asked questions
When should I call a technician?
If you smell gas, see water leaking from the tank body, the flue is damaged, or a repair involves opening gas fittings you are not comfortable with.
Related pages
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