Symptoms
- Display shows dashes or '--' instead of outdoor temperature
- Reading updates rarely or with long delays
- Reading was fine before but stopped after moving the sensor
Likely causes
- CommonWeak or dead sensor batteriesOutdoor sensors run on batteries that weaken faster in cold weather.
- CommonSensor out of range from the displayWalls, distance, and metal siding can all reduce wireless range.
- PossibleSensor and display not paired or re-syncedA power loss on either unit can require re-pairing.
- PossibleInterference from other wireless devicesOther 433MHz or 915MHz devices can interfere with the signal.
- Less commonSensor exposed to water damageEven weatherproof sensors can fail after prolonged exposure to the elements.
What to do
- Replace the batteries in the outdoor sensor with fresh ones.
- Move the sensor closer to the display temporarily to confirm it fixes the reading.
- Re-pair the sensor and display following your model's reset procedure.
- Reposition the sensor to reduce obstructions like walls or metal siding.
- Move other wireless electronics away from the display base station.
- Check the sensor's housing for cracks or signs of water intrusion.
- Replace the sensor if it doesn't transmit even at close range with fresh batteries.
Tools and parts
Replacement outdoor sensorSearch: “weather station outdoor sensor replacement”
When to call a pro
These units are inexpensive enough that replacing a failed sensor is usually simpler than seeking professional repair.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.