Honeywell Home Problems & Troubleshooting

Step-by-step fix guides for the Honeywell Home T6R-HW thermostat and evohome radiator controllers and relays, based on Resideo’s own guides.

Try this first — For the T6R-HW, check your router’s Wi-Fi is secure and set to 2.4GHz. Resideo’s user guide asks for this before setup, and its installation guide lists the T6R’s Wi-Fi as 2.4GHz.

T6R-HW Smart Thermostat

T6R-HW Won’t Connect to Wi-Fi or OfflineFix Guide
T6R-HW Receiver Not CommunicatingFix Guide
How to Rebind a Honeywell Home T6R-HW to Its ReceiverFix Guide
T6R-HW Boiler Fault Alert? What It Means and What To DoFix Guide
T6R-HW Not Turning the Heating OnFix Guide
T6R-HW Error Messages ExplainedFix Guide
How to Reset a Honeywell Home T6R-HW ThermostatFix Guide

evohome Radiator Controllers

HR92 Low Battery? Here’s What To DoFix Guide
HR92 Not Binding to evohomeFix Guide
HR92 Won’t Fit Your Radiator ValveFix Guide
HR91 Won’t Bind to evohomeFix Guide

Relay Box

BDR91 Red Light or Not SwitchingFix Guide

Any work on the boiler itself must be done by a Gas Safe registered engineer, and mains wiring must be done by a competent person with the power off.