This guide is for Honeywell Home T6R-HW owners whose thermostat has lost touch with its receiver box. The steps follow the T6/T6R user guide and the T6R installation guide from Resideo, which makes Honeywell Home products.

What This Problem Means

The T6R-HW thermostat sends its commands to the receiver box by 868MHz radio, and the receiver box is wired to the boiler. If the thermostat can’t reach the receiver box, or the binding between them is missing, it shows one of three receiver alerts.

Common Symptoms

• NO COMMUNICATION RECEIVER BOX on the thermostat
• RF SIGNAL OF RECEIVER BOX LOW on the thermostat
• NO RECEIVER BOX BINDING on the thermostat
• The heating doesn’t respond to the thermostat

Safe Checks You Can Try

1. Read the receiver alert

Resideo’s T6/T6R user guide lists three receiver alerts: NO COMMUNICATION RECEIVER BOX, RF SIGNAL OF RECEIVER BOX LOW and NO RECEIVER BOX BINDING. The table below gives Resideo’s wording for each.

2. Move the thermostat closer

For no communication or a weak radio signal, Resideo says to move the thermostat closer or contact your installer. The wall-mounted version runs from a 230V wall power supply, so moving that one is a job for your installer.

3. Check the receiver box green LED

Resideo’s installation guide says that after powering up both devices, the green LED on the receiver box is on. Resideo says the receiver box must be installed by a competent person with the mains power switched off, so never open it or touch its wiring.

4. Check the power and the circuit breaker

Resideo’s user guide says to check the circuit breaker and reset it if necessary, check the heating system is powered on, and check the receiver box is working.

5. If NO RECEIVER BOX BINDING shows

This means there is no receiver box binding data stored, and Resideo says to contact your installer. The rebinding steps from Resideo’s installation guide are in the guide to rebinding the T6R-HW to its receiver.

6. Call your installer if the alert stays

If the alert is still there after these checks, Resideo says to contact your installer. Anything inside the receiver box or the boiler wiring is a job for a heating engineer.

Receiver alerts explained

Receiver box lights

The alerts come from Resideo’s T6/T6R user guide and the lights from Resideo’s T6R installation guide.

When To Contact Support

If none of these steps fix it, contact Resideo, which makes Honeywell Home products, through Resideo’s UK site.