Why is there no outdoor temperature displayed?
The outdoor temperature is only displayed in the top left corner of the thermostat home screen if you have a compatible two wire outdoor temperature sensor connected to your HōlHōm. This is most often used when you have a heat pump with balance points to optimize its use.
- Remove HōlHōm from the mounting bracket and make sure the RS SIG and RS RET wires are securely connected to the thermostat.
- If the temperature still does not show on the thermostat, it is probably because the outdoor temperature sensor is not compatible. You can replace the outdoor sensor with a 10 kOhm thermistor like an Aprilaire 8052 or equivalent.
- If you don’t want to replace the outdoor temperature sensor, you can disconnect the RS SIG and RS RET wires since the outdoor temperature is optional.