Honeywell Y594 Installation Instructions
![Honeywell Y594 Thermostat manual cover](/images/oupLMHDEKBXCOxRIaagvuqPj/thumbs/thumb175x175.webp)
To set the temperature on your Honeywell Y594 thermostat, use the up and down arrow buttons to adjust the desired temperature setting. Once set, the thermostat will automatically regulate the temperature to your preference.
Check if the thermostat is set to 'Heat' mode. Ensure that the temperature setting is higher than the current room temperature. Additionally, check the furnace power switch and circuit breaker. If issues persist, consult a professional technician.
To change the batteries, gently pull the thermostat away from its wall plate. Replace the old batteries with new AA batteries, observing the correct polarity, and then snap the thermostat back onto the wall plate.
First, check the battery level and replace them if necessary. Ensure the thermostat is securely mounted on the wall plate. If the issue continues, there may be a wiring problem or power issue that requires professional attention.
To reset the thermostat, turn off the power to the unit, remove it from the wall plate, and take out the batteries. Wait for about 10 seconds, reinstall the batteries, and place the thermostat back on the wall plate. Turn the power back on to complete the reset.
Press the 'Schedule' button, then use the arrow keys to select the day and time you wish to set. Adjust the temperature settings for each time period (morning, day, evening, night) and save your schedule by pressing the 'Done' button.
A flashing 'Cool On' indicates a delay in the cooling system activation. This safety feature prevents short cycling of the compressor. Wait for a few minutes for the system to stabilize and start cooling.
To calibrate the thermostat, access the advanced settings by pressing and holding the 'Menu' button. Navigate to the 'Calibration' option, then use the arrow keys to adjust the temperature reading to match an accurate thermometer.
This can occur due to low batteries, wiring issues, or a problem with the thermostat's internal software. Replace the batteries first. If the issue persists, inspect the wiring or consult with a professional technician.
To lock the keypad, press and hold the 'Lock' button until the lock icon appears on the display. This will prevent any changes to the thermostat settings without unlocking.