If the probe reads HH:
HH could be an indication of a low or weak battery. Ensure that you are using recommended batteries:
- Verify you are using fresh batteries in the sensor. Lithium batteries are recommended for installation locations where temperatures can go below -4°F/-20°C.
- Verify you are using batteries with a nominal voltage of 1.5 volts.
NOTE: Some rechargeable batteries carry low or inconsistent voltages that may not properly power the device.
- Mixing different battery types (brands, old/new, etc.) is not recommended.
If this doesn't resolve the issue, a replacement probe is recommended.