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Air conditioner thermistor. The thermistor is a sensor connected to the control board that detects the temperature of the air. The ohm reading should be around 30k at a 75 degree room temperature.

Thermistor

Thermistor, discharge

Ambient temp sensor

Temperature sensor

Thermistor, .312 clip, blue

Indoor coil temperature sensor

Red indoor coil thermistor. Should read around 30K ohms at 70 degree room temperature

Thermistor

Thermistor, .375 clip, blue

Temperature sensor

Sensor, temperature, room

Outdoor coil sensor

Pipe temp sensor assy media

Disch temp sensor assy media
Goodman air conditioners rely on thermistors to monitor indoor and outdoor temperatures, signaling your system when to cycle cooling. A faulty thermistor sends wrong readings to the control board, causing your unit to shut down unexpectedly, overheat, or refuse to start at all. These temperature sensors wear out from thermal cycling and humidity exposure over time.
Get reliable OEM Goodman air conditioner parts that restore accurate temperature sensing and restore consistent cooling comfort.
Common signs include your AC unit shutting off randomly even when it should be running, the thermostat display showing wildly inaccurate temperatures, or the system refusing to start despite power being on. Goodman units often respond with error codes on the control board when thermistors fail. If your unit cycles on and off every few minutes, the thermistor is likely sending false readings that trigger protective shutdowns.
Indoor thermistors measure room temperature and tell the control board when to engage the compressor. Outdoor thermistors monitor ambient conditions and adjust cooling capacity accordingly. A failed indoor sensor causes erratic cycling; a failed outdoor sensor prevents the compressor from starting at all because the system can't determine safe operating conditions. Both are critical—you need both working correctly for reliable cooling.
Yes, thermistors are relatively simple parts to swap if you're comfortable with basic tools and can safely access the location (usually near the evaporator coil or condenser). Always disconnect power before touching any parts. A good approach is to having your model number ready and watching installation videos specific to your Goodman unit to avoid damaging wiring or creating incorrect connections.
A malfunctioning outdoor thermistor often triggers false overheating readings, causing the control board to shut the compressor down as a safety measure. Replacing the faulty sensor restores normal operation and prevents unnecessary lockouts. This is one of the most common repair issues on Goodman value-series air conditioners and is usually a quick fix.


Ensure your Goodman air conditioner performs at its best by replacing faulty sensors and thermistors. Easily find genuine Goodman air conditioner sensor and thermistor parts online with the model or part number lookup tool. Enjoy same-day shipping and our No-Hassle 365-Day Returns policy, ensuring you receive the correct part quickly and stress-free. Plus, benefit from our Price Match Guarantee for competitive pricing. Sensors and thermistors are critical for accurate temperature readings and efficient system operation. When these parts malfunction, it can lead to cooling issues or inefficiency. Replace them promptly to maintain reliable operation. For comprehensive guidance, visit our Air Conditioner Repair Help section. For additional parts, browse our Goodman Air Conditioner Parts page.
Goodman typically places the model number on the exterior nameplate of the outdoor condenser, where it is easy to see once you locate the unit. If the label is not visible, check inside the access panel or along the side of the cabinet. Look for a combination of letters and numbers labeled "Model" or "M/N," and copy it exactly, including any suffixes. Type it into our model number lookup and the catalog narrows to parts made for your unit. This search applies to the entire Goodman air conditioner, so you can filter every associated part category to parts matched to your specific model. That means fewer wrong orders and a faster repair.

The right online resources take the guesswork out of a Goodman Air Conditioner repair. Repair Clinic's diagnostic articles, part testing videos, exploded-view diagrams, and step-by-step written repair guides walk owners and technicians through each stage from symptom identification to final reassembly. Look up your model number to confirm the correct OEM part before you order.

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