BoilerFaultCodes.com

Ideal Halo Air RF WI FI 2 Zone Fault Codes

Natural Gas 2020-present

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Most common fault codes

HP Comms No illumination
Your smart thermostat is unable to talk to your boiler because the wired connection between them has been lost or disconnected.
Gas Safe engineer required · £90-180
No illumination (HP Comms)
Your smart thermostat display is blank because it has lost its wired connection to the heat pump or boiler interface, preventing you from controlling your heating.
Gas Safe engineer required · £90-180
No illumination (Smart Interface Power LED)
Your thermostat receiver has lost power, meaning it cannot communicate with your boiler to turn the heating on.
May be DIY safe · £90-180

All 12 fault codes

Code Severity Plain English
CF05 Low Your heating system is currently trying to establish a link between the heat pump and its control unit.
Connectivity Red Medium Your thermostat has lost its wireless connection to the boiler, meaning your heating controls cannot talk to the system.
Halo screen shows failed to pair Low Your smart thermostat is struggling to talk to your boiler's wireless receiver, making it difficult to control your heating remotely or automatically.
Halo screen shows Replace Halo Low Your thermostat needs to be officially paired or registered with the boiler's receiver to start controlling your heating.
HP Comms No illumination High Your smart thermostat is unable to talk to your boiler because the wired connection between them has been lost or disconnected.
No illumination (HP Comms) High Your smart thermostat display is blank because it has lost its wired connection to the heat pump or boiler interface, preventing you from controlling your heating.
No illumination (Smart Interface Power LED) High Your thermostat receiver has lost power, meaning it cannot communicate with your boiler to turn the heating on.
No power LED on Smart Interface High Your heating control box on the boiler has no power lights and is unable to talk to your thermostat.
Override Green (flashing) Medium Your smart thermostat has lost connection with the boiler, causing it to enter a backup safety mode to ensure you aren't left without heat.
Red (Connectivity) Medium Your smart thermostat has lost its wireless connection to the boiler, meaning you cannot control your heating remotely or via the wall unit.
Zigbee Red (flashing) Low Your smart thermostat is currently in pairing mode and is searching for a connection to your heating system or internet gateway.
Zigbee RSSI is lower than -65 and text red Low Your wireless smart thermostat is too far away from the boiler's receiver, causing a weak connection that might cause your heating to stop responding.

Protect yourself from future repair bills

Monthly cover means no unexpected bills when your boiler breaks down.

Top rated
OpenFix
Boiler & heating care plans
Get a quote →
Hometree
from £12.95/month
Get a quote →
HomeServe
from £8.00/month
Get a quote →

Affiliate links — we may earn a commission at no extra cost to you.