Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Blend-Air Temperature Sensor
The blend-air temperature sensor is of the Negative Temperature Coefficient (NTC) type, with a pointed tip which is introduced into one of the A/C-heater floor vents. It is placed in the floor vent because the air at this location is completely blended. The air supply at this location is also assured, regardless of air distribution setting, due to a controlled leakage.
When A/C-heater control panel has decided what temperature the blended air should have, the reading from the blend-air temperature sensor is used to correct the position of the blend-air damper. If no blend-air temperature can be obtained, coolant temperature and the position of the blend-air damper are used to calculate a default value.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.