Product Overview
The A.O. Smith HSE-SBS-025 is a 25-litre vertical storage water heater designed to provide a consistent supply of hot water. It features advanced technology for durability and energy efficiency, making it suitable for modern households. This manual provides essential information for the safe and effective use of your water heater.

Image: Front view of the A.O. Smith HSE-SBS-025 water heater, showing its white body with a blue panel and the accompanying wired remote controller displaying temperature.
Key Features
Your A.O. Smith water heater incorporates several key features designed for performance, safety, and longevity:
- Blue Diamond Glass-Lined Tank: Offers maximum protection against hard water corrosion, increasing the life of the water heater.
- Glass-Coated Heating Element: Helps prevent scale formation on the element surface, extending its lifespan.
- Long-lasting Anode Rod: A stainless steel core anode rod designed to protect the tank from corrosive elements, even in hard water conditions.
- Wired Remote Controller: Displays temperature and total energy consumed. Allows precise temperature setting between 25°C to 75°C.
- Thermal Cutout: Automatically cuts off power supply if water temperature exceeds the highest preset level, ensuring safety.
- Safety Valve: Designed to automatically relieve and discharge water if pressure or temperature overshoots preset limits.
- Energy Efficient: BEE 4-star rating, indicating high energy efficiency.

Image: Visual representation of the A.O. Smith water heater's key advantages, including its Blue Diamond glass lining, glass-coated heating element, digital display with remote control, long-lasting anode rod, and integrated thermal cutout and safety valve.
Setup and Installation
Proper installation is crucial for the safe and efficient operation of your water heater. It is recommended to have the installation performed by a qualified technician.
What's in the Box:
- 1 Vertical Storage Water Heater
- 1 Wired Remote Controller
- User Manual (this document)
- Mounting Screws
Dimensions:
Before installation, ensure adequate space is available for the unit. The dimensions of the water heater are:
- Length: 44.4 cm
- Width: 44.4 cm
- Height: 37.1 cm

Image: A diagram illustrating the physical dimensions of the A.O. Smith water heater, indicating a length of 444 mm, a width of 444 mm, and a height of 371 mm, shown relative to a human silhouette for scale.
Installation Guidelines:
Free installation is provided by the brand in select cities (Bengaluru, Chennai, Hyderabad, Pune, Delhi, Noida, Gurgaon, Kolkata, Howrah, Hooghly). For other cities, installation by the brand is available for a fee. Please contact A.O. Smith customer service for detailed information and to schedule installation. Ensure that connecting hoses, inlet/outlet fittings, and any necessary demounting of old geysers are considered, as these may incur additional costs or require separate arrangements.
Operating Instructions
Operating your A.O. Smith water heater is straightforward with the wired remote controller.
Power On/Off:
Use the power button on the wired remote controller to turn the unit on or off. The display will illuminate when the unit is active.
Temperature Setting:
The wired remote controller allows you to precisely set the desired water temperature. The temperature can be adjusted between 25°C and 75°C. Refer to the remote controller's interface for specific buttons and indicators for temperature adjustment.
Monitoring Energy Consumption:
The wired remote controller also displays the total energy consumed by the water heater, helping you monitor and manage your electricity usage.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your water heater.
- Tank and Element Protection: The Blue Diamond Glass Lining and Glass-Coated Heating Element are designed to minimize scale and corrosion. However, periodic inspection by a qualified technician is recommended, especially in areas with very hard water.
- Anode Rod Check: The anode rod protects the tank from corrosive elements. Its lifespan is extended by its specialized design, but it should be checked periodically and replaced if necessary by a service professional.
- Safety Valve Operation: Periodically check the safety valve by lifting the lever to ensure it operates freely. Follow manufacturer guidelines for this procedure to avoid injury or property damage.
- Cleaning: Keep the exterior of the water heater clean using a soft, damp cloth. Do not use abrasive cleaners or solvents.

Image: An illustration detailing the "Blue Diamond® Glass-Lining" technology, showing a cross-section of the inner tank with the glass lining and heating element, explaining its role in corrosion resistance.
Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, or if issues persist, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water or insufficient hot water. |
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| Water is too hot. |
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| Loud crackling noise during operation. |
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| Water leaking from the unit. |
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Specifications
| Attribute | Detail |
|---|---|
| Brand | AO Smith |
| Model Number | HSE-SBS- 025 |
| Type | Storage Water Heater |
| Capacity | 25 Litres |
| Wattage | 2000 Watts |
| Voltage | 230 Volts |
| Pressure Rating | 8 Bars |
| BEE Rating | 4 Star |
| Inner Tank Material | Blue Diamond Glass Lined Tank |
| Outer Body Material | ABS |
| Mounting Type | Wall |
| Item Weight | 16 kg 900 g |
| Item Dimensions (LxWxH) | 44.4 x 44.4 x 37.1 Centimeters |
Warranty Information
A.O. Smith provides comprehensive warranty coverage for your water heater:
- Inner Tank: 7 years warranty.
- Glass Coated Heating Element: 2 years warranty, extendable to 4 years if registered within the first 60 days of purchase.
- All Other Parts: 2 years comprehensive warranty.
Note: Warranty applies only if the water heater is purchased from an authorized dealer. Please retain your purchase receipt for warranty claims.
Customer Support
For any queries, installation requests, service needs, or troubleshooting assistance, please contact A.O. Smith customer service:
- Customer Service Number: 18001032468
- For installation, please call the customer service number to schedule an appointment.