Description
The AC Temperature Sensor NTC Thermistor – Copper Probe & Coil Sensor is an essential diagnostic and operational component used in residential split-system, window, and commercial air conditioners. Featuring an internal Negative Temperature Coefficient (NTC) thermistor element sealed inside a high-conductivity cylindrical copper shell, this probe clips directly onto the evaporator coil copper bend. It continuously monitors refrigerant temperature variations, transmitting precise electrical resistance feedback to the indoor unit’s main control PCB to protect against coil freezing, manage system defrost modes, and optimize compressor operation.
Technical Specifications
| Specification | Details |
| Product Name | AC Temperature Sensor NTC Thermistor – Copper Probe & Coil Sensor |
| Sensor Type | NTC (Negative Temperature Coefficient) Thermistor |
| Probe Head Material | Cylindrical Solid Copper Shell |
| Wiring Harness | 2-Core PVC Insulated Black Lead Wire (26AWG) |
| Connector Type | 2-Pin White PCB Socket Terminal Plug (XH2.54 Standard) |
| Operating Range | -30°C to +105°C |
| Primary Application | Evaporator Coil Thermal Protection & Anti-Freeze Sensing |
| Product Condition | New |
Key Features
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High Thermal Conductivity: Solid copper cylinder probe provides instant, accurate response to rapid pipe temperature changes.
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Moisture-Sealed Encapsulation: Hermetically sealed interior protects the delicate NTC thermistor element against continuous condensation inside the evaporator casing.
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Flexible Lead Wire: Durable, heat-resistant PVC insulated wire allows smooth routing through internal cabinet frames.
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Standard 2-Pin Plug: Equipped with a standard white terminal connector for direct plug-and-play installation on AC main circuit boards.
Supported Applications
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Evaporator Coil Protection: Detects frost build-up on indoor heat exchanger coils to trigger anti-freeze shutdowns or defrost cycles.
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Split & Window AC Servicing: Serves as a direct replacement coil thermistor for wall-mounted, cassette, and window air conditioning units.
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Universal PCB Boards: Fully compatible with universal air conditioner control board assemblies requiring 2-pin NTC sensor inputs.
Benefits
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Prevents evaporator coil freeze-ups and compressor damage by maintaining reliable pipe temperature signals.
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Resolves sensor-related error codes (such as coil sensor open/short circuit faults) on digital display units.
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Durable copper casing resists corrosion and thermal expansion stress.
Package Includes
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1 x AC Temperature Sensor NTC Thermistor (Copper Probe & Cable Assembly)
Important Buyer Verification Notes
Notice for Technicians & Contractors: Confirm the resistance specification (typically 5K, 10K, or 15K @ 25°C) required by your control PCB before installing. Ensure the copper probe shell is pushed firmly into the metal retaining clip mounted on the evaporator coil return bend for optimal contact.
Why Buy From Al Ramiz
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Genuine Quality Parts: Field-tested HVAC control components, thermistors, and spare parts.
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UAE Stock & Local Inventory: Fast order processing and local dispatch across the UAE.
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Technical Support: Professional assistance for component compatibility and HVAC troubleshooting.
Frequently Asked Questions (FAQs)
What is the purpose of the copper probe shell on this temperature sensor?
The copper shell provides superior thermal conductivity, allowing the internal thermistor to rapidly detect temperature changes on the copper coil pipe surface.
How do I install this coil sensor on my air conditioner?
Slide the copper cylinder head into the factory metallic spring bracket located directly on the indoor unit’s copper evaporator tube.
What happens if the coil temperature sensor fails?
A faulty coil sensor can cause the indoor evaporator to freeze solid, force the system to display error codes, or prevent the compressor from turning on.
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