Description
The Air Conditioner Indoor Double Probe Temperature Sensor – Dual Thermistor is a dual-function sensing assembly synthesized from standard HVAC mainboard component specifications. Engineered specifically for residential wall-mounted split ACs and light commercial cooling equipment, this unit integrates two distinct NTC thermistor probes into a single organized wire harness:
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Epoxy Resin Ambient Probe: Positions near the return air filter grille to continuously detect room temperature shifts and signal compressor start/stop limits.
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Copper Tube Shell Probe: Inserts directly into the evaporator coil copper clip to monitor pipe temperatures, protecting against coil icing and managing automatic defrost cycles.
Both sensors send synchronized electrical resistance signals directly to the indoor control PCB via a single multi-pin terminal socket connection.
Technical Specifications
| Specification | Details |
| Product Name | Air Conditioner Indoor Double Probe Temperature Sensor – Dual Thermistor |
| Sensor Type | Dual NTC (Negative Temperature Coefficient) Thermistors |
| Ambient Probe Construction | Black Epoxy Resin Sealed Teardrop Head |
| Coil Probe Construction | Sealed Cylindrical Solid Copper Shell |
| Wiring Harness | Heat-Resistant Insulated Dual Lead Cable |
| Connector Type | Multi-Pin PCB Socket Terminal Plug |
| Operating Thermal Range | -30°C to +105°C |
| Primary Application | Split AC Indoor Unit Ambient Air & Evaporator Coil Temperature Monitoring |
| Product Condition | New / Universal Replacement |
Key Features
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Dual-Point Thermal Monitoring: Combines room ambient air sensing and evaporator coil tube monitoring into one harness assembly.
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Rapid Copper Conductivity: Solid copper cylindrical head delivers instant thermal response to coil temperature changes and frost formation.
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Moisture-Proof Epoxy Bead: Hermetically sealed black epoxy teardrop bead resists continuous indoor cabinet humidity and condensation.
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Streamlined Cable Management: Pre-bundled leads keep wire routing clean and prevent tangling inside the fan blower cabinet.
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Direct Socket Connection: Features a standardized multi-pin white PCB connector plug for straightforward replacement on mainboards.
Supported Applications
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Wall-Mounted Split AC Indoor Units: Primary replacement dual sensor for leading split air conditioner brands.
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Universal Control Boards: Compatible with universal indoor AC replacement mainboard kits configured for double-probe sensors.
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Evaporator Coil Protection: Prevents indoor coil freeze-ups and regulates system defrost modes.
Benefits
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Replaces both room air and coil thermal sensors in a single, simple repair step.
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Resolves persistent AC error codes related to sensor open/short circuits, incorrect room readings, or evaporator freeze-ups.
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Durable wire insulation withstands ongoing thermal expansion and cabinet vibration.
Package Includes
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1 x Air Conditioner Indoor Double Probe Temperature Sensor Harness Assembly
Important Buyer Verification Notes
Notice for Technicians & Contractors: Confirm the resistance values (e.g., 5K, 10K, or 15K @ 25°C) and connector pin layout required by your specific indoor unit PCB before installation. Ensure the copper probe is pushed fully into the coil retaining clip for accurate thermal transfer.
Why Buy From Al Ramiz
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Genuine Quality Parts: Field-tested HVAC sensors, control components, and electronic spares.
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UAE Stock & Local Inventory: Fast processing and local dispatch across the UAE.
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Technical Support: Expert assistance for AC component diagnostics and replacement selection.
Frequently Asked Questions (FAQs)
What are the two probes used for in this assembly?
The black epoxy probe measures ambient room air temperature entering through the return grille, while the copper probe clips onto the evaporator coil to monitor coil temperature and prevent icing.
Can I use this double probe sensor on a single-probe control board?
No. This assembly requires a mainboard equipped with the matching multi-pin terminal socket designed specifically to accept dual sensor inputs.
How do I know if my double probe sensor is faulty?
Common symptoms include the AC unit shutting off unexpectedly, displaying temperature sensor error codes, failing to cool, or allowing the indoor coil to ice over completely.
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