I have the Acurite 00604RX two zone thermometer (outdoor / indoor). The outdoor connection went bad so i replaced both units with new batteries. I still cannot see the outdoor temperature, just displays two dashs (- -) where the temp should be. What should i check / do? Thanks a lot.

Question edited for a LOT more clarity. full 'make model (what it is)'.
Question moved from Computers to Model category.

Remove the batteries from both indoor and outdoor unit. Leave them out for 10 minutes. Replace the outdoor sensor with a new battery (2xAA), and then new batteries in the main unit (3xAA).

00605 Wireless Weather Station + Companion Instructions

AcuRite https://www.acurite.com > media > manuals > 0... PDF NOTE: When replacing the batteries for the wireless sensor, remove the batteries from the sensor and clear that sensor's channel on the main unit by pressing ...
6 pages

Hard Reset for Sensor Models 00606TX/06009RMA1 & ...

AcuRite https://support.acurite.com > en-us > articles > 360007...
The following reset steps can be performed to correct issues of the sensor not connecting to the display. Symptoms of the sensor not...
https://fccid.io/RNE00605TX/User-Manual/User-Manual-707183

..

Usually those symbols mean your out of range of the instruments range . Do you have the sensor in direct sun light ? There may also be a defect I would try to contact them

To reset your unit, please verify that you are using a good-quality, standard alkaline battery such as Energizer or Rayovac. Then, follow the steps below.

1. Bring both the sensor and display unit indoors and remove at least one battery from each.
2. Make sure the A-B-C switch on both units match. Sometimes changing to a different channel can help.
3. Reinstall the battery in the outdoor sensor.
4. Reinstall the battery in the display unit.
5. Let the units sit within a couple feet of each other for about 20 minutes to gain a strong connection.

If you need any further assistance, please contact AcuRite Customer Support at 1-877-221-1252 or [email protected].

We would recommend a reset of your unit. Please verify that you are using good-quality, standard alkaline batteries such as Energizer or Rayovac, then follow the steps below.
1. Bring both the sensor and display unit indoors and remove at least one battery from each.
2. Make sure the A-B-C switch on both units match. Sometimes changing to a different channel can help.
3. Reinstall the battery in the outdoor sensor.
4. Reinstall the battery in the display unit.
5. Let the units sit within a couple feet of each other for about 20 minutes to gain a strong connection.
If you need any further assistance, please contact AcuRite Customer Support at 1-877-221-1252 or [email protected].

Hi Jerry,

While lithium batteries are recommended for the outdoor sensor it is not recommended they be used in the indoor display unit. Try using a good quality, fresh alkaline batteries and you should find your display turns back on.

Have you changed the batteries on the outside sender unit?

It is the outdoor sending unit for and indoor/outdoor thermometer. I have had one for years and am looking for another one.

How do I change the clock from 24hr to 12 hr?

This is a link to your manual:

AcuRite 75321A1 Instruction Manual

Dave

Double check the batteries and the direction in which they are installed. If there is one backwards in the sending unit that is outside, it will not send a signal. Also, there is typically one battery in the indoor unit that is responsible for receiving the signal from the outdoor unit. If all of the batteries are in correctly except that battery, you will see the display, but will not get the data transmitted from the outside sending unit.