Description
Product Overview
The WANATOP water temperature switch is engineered for automotive cooling applications, delivering accurate temperature detection and reliable circuit control. Constructed with a solid brass contact, the switch meets OE specifications (BNP1883, 17680‑70020, 17680‑78000, 21595M02) and operates on a low 220 µV voltage with a 5 mA current rating. Its plug‑in connector type simplifies installation, while the normally closed contact ensures safety by default. The unit measures 3.15 × 2.36 × 1.97 inches and weighs 2.2 lb, making it compact for tight engine bays.
Usage
Designed for a range of vehicles including Suzuki, Nissan and Rover models, this switch is ideal for monitoring engine coolant temperature and activating fans or warning lights. Install it in the radiator hose or coolant reservoir where temperature fluctuations are critical. The plug‑in design allows quick replacement without rewiring, suitable for both professional mechanics and DIY enthusiasts. 
Why Choose Us
WANATOP guarantees OEM‑level quality with rigorous testing to meet automotive standards. The brass contact provides superior conductivity and resistance to corrosion, extending service life compared to generic plastic contacts. Our product ships with a full set of specifications and is backed by a no‑discontinue guarantee, ensuring long‑term availability for maintenance and fleet services.
Key Features
- Brass contact for high conductivity and durability
- OE‑approved part numbers for direct OEM fit
- Low voltage operation at 220 µV with 5 mA current rating
- Plug‑in connector for fast, tool‑free installation
- Normally closed design for safety‑first circuit control
FAQ
What vehicles are compatible with this switch?
The switch is compatible with Suzuki, Nissan and Rover models that use the listed OE part numbers, covering a wide range of engine types and years.
Can I replace the switch myself?
Yes, the plug‑in connector allows a DIY installation without special tools. Ensure the engine is cool and disconnect the battery before replacement.
What does “normally closed” mean?
In its default state the circuit is closed, allowing current flow. When the temperature reaches the set point, the switch opens to interrupt the circuit, protecting the engine.
Is this part covered by a warranty?
WANATOP offers a one‑year limited warranty against manufacturing defects, providing peace of mind for your purchase.
How does the low voltage rating affect performance?
The 220 µV rating ensures the switch operates safely within modern vehicle electrical systems, reducing the risk of overload while maintaining accurate temperature response.
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