BoilerFaultCodesKeston Room Stat Fault Fault Code
Also written as ROOMSTATFAULT — same fault.
The Keston Room Stat Fault fault code means: your boiler is not receiving the correct signal from your wall thermostat, so it has stopped heating your home to prevent an incorrect temperature.. It appears on 2 Keston models in our database.
Technical description: Problem with room thermostat batteries or communication
DIY fix possible
Check the batteries in your wireless wall thermostat and replace them if necessaryEnsure your thermostat receiver box is receiving power and the display is litTurn off your boiler at the main spur for 30 seconds to restart the control system
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like Room Stat Fault: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Keston models that show the Room Stat Fault fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Keston Room Stat Fault fault code information on this page is sourced and cross-checked against the official Keston service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026