Honeywell T4R Wireless Programmable Thermostat Kit - White

Use the up and down arrows on the thermostat to adjust the temperature. The setting will hold until the next scheduled time or you can use the override feature for a set duration.

Go to the holiday mode setting on the thermostat and set the desired temperature and duration of the holiday period. The thermostat will then maintain the set temperature for the specified time.

No, the T4R is designed for on/off and OpenTherm boilers. Verify compatibility before installation.

Open the battery compartment on the back of the thermostat and replace the old batteries with new ones of the correct type (usually AA). Check the manual for specific instructions.

OpenTherm is a communication protocol that allows the thermostat to modulate the boiler's output, improving efficiency and comfort. It's supported by compatible boilers.

The EIM (Equipment Interface Module) relay box receives the wireless signal from the thermostat and controls the boiler, turning it on and off or modulating the heat output depending on the system.

The user manual is included with the product and can often be downloaded from the Honeywell website or found online through a search engine.

Check the batteries in the thermostat and ensure they are properly installed. Check that the receiver is powered and properly wired to the boiler. Verify the pairing between the thermostat and receiver.

Verify the thermostat is set to heat mode and the temperature is set above the current room temperature. Check the EIM relay box for any error indications. Inspect the boiler and its connections.

Replace the batteries in the thermostat.

Confirm that the time and date are set correctly. Ensure the schedule is programmed accurately. Manually override the schedule to see if the heating activates.