If you’re troubleshooting split AC temperature sensing issues, the right sensor can fix common error codes and restore accurate readings. This guide highlights five compatible sensors that target tube and room temperatures, helping different buyers choose the best fit. Ideal for homeowners, HVAC technicians, and DIYers who want reliable temperature monitoring without replacing whole units. The table below offers a quick comparison of each product’s compatibility and key strengths.
| Product | Best For | Key Benefit |
|---|---|---|
| Air Conditioner Temperature Sensor Thermistor Probe (AHKWK) | GREE units needing F1/F2 error resolution | Dual sensor design for tube and air temperature |
| GREE Combo ID Coil/AMB Temperature Sensor 3900031302 | GREE fans seeking official-style replacement | Direct GREE part with coil/amb sensor data |
| Tube Sensor 5K for Galanz (2 Pack) | Galanz owners needing two probes | Two probes, compatible with Galanz models |
| XHSESA Temperature Sensor (GREE compatible) | Users needing F1/F2 fix, durable build | 20K copper tube head, 15K rubber head |
| WTC100 Wireless Temperature Controller (SENSTREE) | General use with remote control comfort | Built-in sensor, versatile heating/cooling control |
Air Conditioner Temperature Sensor Thermistor Probe for GREE

This universal sensor targets GREE air conditioners, fitting most models to ensure accurate temperature sensing. It is especially suitable for buyers wanting a quick fix for F1 and F2 fault codes by accurately monitoring tube and air temperatures. The design features a 20K copper head for tube temperature and a 15K rubber head for room air temperature.
Who should buy: Homeowners with GREE units facing F1/F2 errors who need a dual-probe approach. Why chosen: It directly addresses common fault codes with a dual-sensing design for both tube and ambient air. Caution: Verify model compatibility before purchase to avoid misfit on non-GREE models.
GREE Combo ID Coil/AMB Temperature Sensor 3900031302

This official-looking option is the GREE Combo ID Coil/AMB Temperature Sensor, model 3900031302. It is designed for GREE condensers and provides a direct, plug-in approach to temperature sensing. The description emphasizes compatibility and straightforward replacement for coil and ambient readings.
Who should buy: Techs or long-time GREE owners seeking a direct OEM-style part. Why chosen: It aligns with GREE system architecture, reducing guesswork in sensor replacement. Caution: Availability and model matching should be confirmed for older or regional GREE variants.
Tube Sensor 5K for Galanz (2 Pack)

These Galanz-specific tube and room temperature probes come as a two-pack, designed to replace tube temperature probes and room temperature probe parts in Galanz air conditioners. The parts are described as high-quality, durable, and tested for stable performance.
Who should buy: Galanz owners needing back-to-back replacements or two-point sensing. Why chosen: Availability of two probes allows flexibility in meeting different Galanz configurations. Caution: Only suitable for Galanz models; using them on non-Galanz units may not fit.
XHSESA Temperature Sensor for GREE

The XHSESA sensor combines a 20K copper-titted tube temperature head with a 15K rubber ring head for ambient air temperature. It aims to fix F1 and F2 fault codes by delivering precise temperature readings. It’s built with durable materials and undergoes quality testing before service deployment.
Who should buy: Users seeking a robust, dual-head solution for GREE systems. Why chosen: Clear dual-head design supports both tube and ambient measurements. Caution: Exact wire lengths are specified; ensure your installation space accommodates longer copper leads.
WTC100 Wireless Temperature Controller by SENSTREE

The WTC100 is a plug-in wireless temperature controller with a built-in sensor. It supports heating and cooling modes, provides high and low temperature alarms, and allows easy Celsius/Fahrenheit switching. It is suitable for various environments, including attics, greenhouses, and window A/C setups.
Who should buy: Buyers seeking a flexible, wireless control solution that pairs with existing window A/C or other devices. Why chosen: Its wireless setup and integrated sensor simplify room-temperature management. Caution: It requires an appropriate outlet and may not replace primary AC sensors in all models.
Buying Guide
Key considerations when choosing a split AC temperature sensor:
- Compatibility: Confirm model compatibility with your specific AC brand (GREE, Galanz, etc.).
- Sensor Type: Decide between copper tube temperature sensors and rubber/ring ambient sensors, or dual-head designs for comprehensive coverage.
- Measurement Range and Precision: Look for clear temperature heads (e.g., 20K copper, 15K rubber) and reliable connectors.
- Installation: Consider wire lengths and installation space; longer leads may be needed for ceiling or distant units.
- Reliability: Durable materials and factory testing help ensure long-term performance in varying environments.
- Special Features: Some models offer alerts, automatic fault code addressing, or wireless control integration.
What to avoid or double-check
- Avoid sensors not specified for your brand if control logic is model-specific.
- Check for exclusive-use parts vs. universal replacements to prevent compatibility issues.
- Be mindful of the two-pack options if only a single probe is needed, to avoid unnecessary purchases.
Buying questions to guide your choice
- Will the sensor address F1 and F2 fault codes on my unit?
- Do I need a dual-head sensor for tube and ambient air temperature?
- Is a wireless controller beneficial for my setup or do I prefer a direct plug-in sensor?
- What is the maximum lead length I can accommodate in my installation?
- Is OEM-brand replacement necessary for my model or can a universal part work?
FAQ
- Q: What does F1 or F2 code usually indicate in split AC systems?
A: F1 and F2 typically relate to temperature sensor readings and fault conditions within the control circuit. - Q: Are dual-head sensors always better?
A: Dual-head sensors provide measurements for both tube and ambient air temperatures, which can improve accuracy and fault diagnosis in some models. - Q: Can I install sensors myself?
A: Many sensors are designed for DIY replacement, but follow manufacturer guidance and power-off the system during installation. - Q: Will replacement sensors affect warranty?
A: Replacements can affect warranty coverage; consult your warranty terms before swapping components. - Q: Do universal sensors fit all brands?
A: Universal sensors fit many models but confirm compatibility with your specific make and model to avoid fit or function issues.