Hello Clay, Typically the beeping and flashing indicates the sensor and display have lost connection. Do you see the outdoor information updating? Please verify you are using the battery recommendations and try the troubleshooting steps listed below.
•Verify you are using fresh alkaline batteries or lithium batteries (when temperature is below -4°F/-20°C) in sensor.
•Quality brand batteries are recommended, including Duracell, Rayovac, Energizer, or Kirkland.
•Verify batteries are fresh. The battery expiration date should be at least 6 years out. Batteries can lose 3% power or more every year in storage.
•Heavy duty, extra strength or generic / store brand batteries are not recommended for use with AcuRite products because they may cause performance irregularities due to the way these types of batteries disperse power. Each battery should not exceed 1.6 volts.
•Rechargeable batteries are not recommended for use with AcuRite products because they may cause performance irregularities due to the voltage instability of these types of batteries.
•Mixing different battery types (brands, old/new, etc.) is not recommended.
- Bring both units side by side and remove all batteries, unplug display if it has an ac adapter
- Place batteries into the main unit first
- Place batteries into the sensor, before closing the sensor press the TX button
- Allow units to sit side by side until they connect.