I have a Honeywell thermostat TH3820R1003 that I want to connect a outdoor sensor to but see no points to do so on this sub base

The "OP sensor not connected" error message on a Honeywell HZ432 zoned 3-way AC unit indicates that there is a problem with the outdoor temperature sensor. The outdoor temperature sensor, also known as the outdoor sensor or the thermistor, is responsible for measuring the outdoor temperature and sending the data to the thermostat. If the sensor is not properly connected or is malfunctioning, the AC unit may not cool properly or may not function at all.
Here are a few steps you can take to troubleshoot and fix the problem:

1. Check the sensor connection: Make sure that the outdoor temperature sensor is securely connected to the thermostat. If the connection is loose, the sensor may not be able to send the correct data to the thermostat.
2. Check the sensor location: Make sure that the outdoor temperature sensor is located in a suitable place where it can accurately measure the outdoor temperature. It should be in a shaded area, away from direct sunlight and heat sources.
3. Check the sensor wiring: Make sure that the sensor wiring is not damaged or frayed. If the wiring is damaged, it will need to be replaced.
4. Replace the sensor: If the sensor is malfunctioning, it will need to be replaced.
5. Check the thermostat: Make sure that the thermostat is set to the correct mode and temperature.

The TH8320U1016 thermostat has 2 terminal pins "S1 and S2" that are the ones that are connected to your outdoor sensor, but the TH9320WF003 it doesn't have the "S1 and S2" terminal pins, so I would recommend you the TH6320WF2003 this thermostat is compatible with all system types and with outdoor sensors terminal pins "S1 and S2".

Paula, remove the cover of the thermostat and look for a model number. The actual thermostat may have to be removed from the sub-base to find it. There may be either a long line of pins on the sub base that matches up with holes on the back of the thermostat when you re attach it....or there may simply be a 3" long ribbon connector that makes the connection.

Once you have the correct model number call Honeywell Customer Service at 1 877 841 2840 and work your way through the menu until you get to 'if you a homeowner push this number'. Once in touch with a live troubleshooter, they should be able to assist you in programming. You should know what kind of system you have, gas, electric or heat pump heat with central air.

You MUST have the correct model number BEFORE you call.

You need to test from Green to Common on the thermostats sub based or air handler low voltage terminal board to see if the stats the culprit or the board/relay etc.

Turn off the circuit breaker to the AC and heating unit. The circuit breaker is inside the home electrical box. The door of your electrical box has a guide indicating which circuit breaker controls the cooling and heating system.Pull the cover off the Honeywell manual thermostat. If necessary, use a flat-head screwdriver to pry the cover away from the base of the thermostat. Locate the two small screws securing the sub-base to the base of the thermostat. The sub-base is the portion of the thermostat that has the indicator dial or indicator lever. Remove the screws with a Phillips-head screwdriver, and pull the sub-base away from the thermostat.Remove the screws securing the base of the thermostat to the wall with the Phillips-head screwdriver. Pull the thermostat base away from the wall so you can access the wires.Loosen the terminal screws securing the wires to the back of the thermostat with the flat-head screwdriver. Wrap the wires around a pencil or a large screw. This will prevent the wires from accidentally falling inside the wall cavity.

Make sure the NEW thermostat is for Heat Pump.. Now look at the sub-base.. The sub base will have a O/B terminal to connect the orange or blue wire to. Be sure to look back at the old thermostat to verify which wires landed on the O/B previously.. Let me know ig you have any more questions

TURN THE POWER OFF. You need to be sure that the thermostat is made for the control voltage of your furnace. If the new thermostat has mercury contacts it has to be level to be accurate. One wire would be connected to the R terminal of the thermostat sub base and the other wire would be connected to the W terminal on the thermostat sub base. Seal up the hole in the wall where the wires pull through so cold air does not effect the thermostat. If the thermostat has an adjustable heat anticipator you will need to check the amp draw through the thermostat to set the anticipator properly. If you do not have an amp meter I would start out at a .4 amp setting and see how the thermostat cycles.

As long as this is a 24 volt thermostat, remove the thermostat from the sub base and connect the wires that are connected to terminals R & W. If the furnace works the problem is in the thermostat. Have you tried new batteries

Remote Sensor (Setup Function 0340): If an optional outdoor sensor is installed, the thermostat can display the outside temperature. If an optional remote indoor sensor is installed, the thermostat will display the temperature at the sensor location (the internal sensor in the thermostat is not used).
\ 0 No remote sensor
1 Outdoor sensor (display only)
2 Outdoor control sensor (select heat pumps

The Honeywell CT87 thermostat is a normal round thermostat, not digital and may have a sub-base installed with it that has a two switches on it. One is for Fan (Auto or On)and the other is for Heat, Cool and Off. Make sure the Fan switch is in the Auto position and the other switch is in either the Cool or Off mode. If you continue to get cooling, you have a short in the thermostat wire or a stuck relay in th indoor or outdoor unit. To test this, while the unit is running; remove the round outer ring on the thermostat by pulling it straight off towards you. You will find 3 slotted head screws that hold the thermostat to the sub-base. These screws are located at the 3 o'clock, 7 o'clock and 9 o'clock positions. Turn these screws counterclockwise with a small head screwdriver. They are held in place so should not fall and get lost. With the front of the thermostat removed from the base, the air conditioner should stop running. If the unit continues to run, you will need to have your A/C system inspected by a technician. If in fact your thermostat is digital, look to see how it is mounted to its sub-base and remove it. If the system stops, you may have a bad thermostat or the Fan switch is in the On position. Hopefully this will help.