It is 6 AM in December. You turn on the geyser, wait 10 minutes, step into the shower — and the water is ice cold. The geyser's power light is on. It looks like it is working. But clearly, something inside has stopped doing its job.
This is one of those problems that people in Samastipur often try to "wait out" — turning the geyser off and on, waiting longer, hoping it resolves itself. It rarely does. Here is what is actually happening inside, explained clearly, with what each fix costs.
Samastipur lies in the Gangetic plain. The groundwater here has a moderately high mineral content — what plumbers call "hard water." When this water is heated repeatedly, the dissolved calcium and magnesium crystallise and stick to the heating element and the inside of the tank as a white chalky deposit called limescale.
This scale acts as an insulator around the element. The element has to work harder and get hotter just to push the same heat through the scale into the water. Over time, elements in Samastipur fail 30–40% faster than in cities with softer municipal water supply. Understanding this helps you understand why annual descaling is not optional here.
The heating element is a metal rod submerged in the water tank. Electricity flows through it, it gets hot, and that heat transfers to the water around it. When the element breaks internally (a very thin wire inside the element casing fails), no more heat is generated — but the geyser continues to look like it is working because the thermostat and power circuits are separate from the element.
Signs: Geyser light on, no unusual sounds, but water completely cold after 15+ minutes. Sometimes a mild tripping of the MCB when geyser is switched on.
How we test: Disconnect the element leads and test resistance with a multimeter. A healthy element reads 8–30 ohms depending on wattage. A failed element reads open circuit (infinite resistance).
Fix: Element replacement. Takes 20–30 minutes. We drain the tank, replace the element and its rubber gasket (to prevent leaks), and refill. Cost: ₹400–₹900 depending on brand.
The thermostat reads the water temperature and tells the element when to stop heating (once target temperature is reached) and when to start again (when water cools below a threshold). If the thermostat fails in the "off" position — which is common in older geysers — the element never gets the signal to start heating.
Signs: Geyser makes a click sound but no heat, thermostat dial turns but nothing changes, water heats slightly but stops far below normal temperature.
A common mistake: In storage geysers, the thermostat dial is often accidentally turned to its lowest setting (marked MIN or a snowflake icon) during cleaning. Before calling a technician, check that the temperature dial is set to at least 60°C.
Fix: Thermostat replacement ₹300–₹700. Paired with element replacement if both are found faulty (which is common in geysers over 4 years old).
Every geyser has a thermal cutout — a small safety device that disconnects power to the element if the water temperature exceeds a safe limit (usually 80–85°C). This typically trips when the thermostat fails to shut off the heating at the right time. It is a protection mechanism — it saves the tank from bursting.
Once the thermocut trips, the geyser appears on but produces no heat. Unlike a fuse, some thermocuts are resettable (you press a small reset button, usually behind a hole in the geyser back panel). Others are one-time devices and must be replaced.
Important: If a thermocut has tripped, do not just reset it and walk away. The thermostat that caused the overheating must also be checked and replaced — otherwise the thermocut will trip again.
Fix: Thermocut replacement ₹150–₹350 plus thermostat check.
When scale builds up heavily on the element, the element surface temperature rises dramatically (because it cannot transfer heat effectively into the water). This accelerates element failure and also causes longer heating times. You may notice: geyser takes 25 minutes to heat water that used to heat in 12 minutes, or the water feels warm but not properly hot even on maximum setting.
Full scale removal involves draining and flushing the tank with a diluted acid solution (citric acid or specialised descaler), then flushing with clean water. This should be done every 18–24 months in Samastipur depending on how hard your water supply is.
Fix: Professional descaling service ₹400–₹700 including labour.
This is less about the geyser itself and more about the wiring that feeds it. Geysers draw 1,500–2,000 watts. If the wiring to the geyser point is undersized (a common issue in older Bihar homes with 1.5mm wire instead of 2.5mm), the wire heats up, causes voltage drop, and the element does not get enough power to heat efficiently.
Also check: the dedicated MCB for the geyser circuit should be 16A. Many older homes have it wired through a 6A or 10A MCB, which trips repeatedly or reduces power.
Signs: Geyser works fine in the morning when other loads are low, but struggles in the evening when all appliances are on.
Fix: This requires an electrician to upgrade the wiring. Not something a geyser technician handles alone, but we can identify the problem and advise.
| Problem | Typical Cost |
|---|---|
| Heating element replacement | ₹400–₹900 |
| Thermostat replacement | ₹300–₹700 |
| Thermocut / thermal fuse | ₹150–₹350 |
| Descaling service | ₹400–₹700 |
| Safety valve replacement | ₹200–₹450 |
| Inspection charge | ₹99 (adjusted against repair) |
Not heating, MCB tripping, leaking — same day repair. Element, thermostat, descaling. ₹99.
View Service Page →Inspection ₹99 · No Fix No Charge · 7 AM – 9 PM, All Days
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