What the manual says
Manufacturer manualControl Status: Gas On
From this model's manual
Verified against the Potterton/Potterton Envoy 30 installation & service manual.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register →
Boiler cover options
Avoid the next call-out bill
A cover plan would handle faults like Gas On: no call-out fees, no surprise bills.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.
All 31 fault codes on the Envoy Plus
Seeing a different code? Every code this model can display, in one place.
Blocking ErrorBurner OnC1C2C3Case sensorCase temperatureControl failedDisplay not illuminatedDry fireDry fire sensorFan OverrunFan PurgeFan speedFlame lossFLASHINGFlow sensorHot Surface IgniterIgnition Pre ChecksLockoutOverheatPump Overrun - Central HeatingPump Overrun - Storage TankReturn sensorSensorSensor FlowSensor Flow or return sensorShorted signalStand-byWiring fault