It stopped displaying my outside weather conditions. (wind, temp, etc)

The display has the internal sensor for temp and barometer, The 5 in one has the sensor for outdoors and shows temp, wind speed and direction, humidity and rain. With the added lightning detector having the additional temp sensor in it, the system is redundant. It is recommended to put the sensor outside for best results that t have the least interference and maximum range..

I assume it is a wireless station. If so, there is a procedure to go through to get the temperature sender and the base station to sync up and work. You need to check your owners manual to get the exact procedure for your unit. On my station, I have to remove the battery from the base station, let it power up and within 5 minutes, install the battery in the remote station(s) (temperature, rain gauge, wind gauge, etc.). Also, you must keep the remote station within a certain range for the base to get a good signal. Probably 25 feet, but the owners manual will have the right number. Also, use new batteries.

Here's the manual for the AcuRite Weather Forecaster. If it's not showing the outside temperature, make sure the A-B-C switch is set to match the display unit. Not doing so might be the reason it's not synchronizing and displaying the outdoor temperature. https://www.acurite.com/media/manuals/75077-75107-instructions.pdf

Yes they are designed to operate in a conditioned space. If it has a condenser fan motor you could put a cycle switch on it and that would extend it's operating range

2 possibilities:
1 - HVAC External Drain Tube stopped up with dirt, bee nest, etc. Hard to get to w/out a car lift. Need to clear and drain HVAC box.
2 - Leaking heater core inside HVAC box. Moisture from defog will smell sweet and be hard to clean off glass. Requires Dash removal and AC service to replace Heater Core. Very time consuming and Expensive A-Freeze fumes are also lethal if inhaled.

Try Solution #1 First, Least Expensive, Non-Lethal Condition.

To set station Hold SET key down for 3 secs. Press SET key to select setting in this sequence. 1. Time Zone 2. 12/24hr format 3.Manual time setting HR/Min. 4. Calendar setting y/mm/dd 5.Temp display C or F 6.Air pressure display hPa or inHg 7.Relative pressure setting from 919.0hPa-1080.0hPa 8 Pressure threshold (sensitivity)Default 2 9.Storm threshold Default 4 10.Wind speed reading km/h, mph etc 11 Rainfall display in mm or inch. Use the + and History keys to adjust values (History key is - ) When replacing batteries Fit outside unit ones first then fit inside unit ones in that sequence so it can interpret the security code.

I have access to myPersonal Weather Station on my phone with 2 widgets:
1. Cumulus Realtime. Requires a PWS compatible with Cumulus software (free forWindows) and your own website for Cumulus to upload the data. The widgetaccesses the website to get readings at predefined intervals.
2. PWS Time and Weather. Requires a PWS and software such as Cumulus to uploadyour data to Weather Underground (Wunderground), which the widget accesses.

My outside display stopped working, but the inside display still worked. I found that one of the two batteries in the inside unit was almost all the way dead. Once I replaced both batteries the outside display worked. I also checked the batteries in the outside unit. After all batteries were installed, I pushed the small button that is inside the battery compartment on the outdoor unit. It's now working perfect..