Error Code	Symptom	Fault Type	Guide
01	Vokera water heater locks out with code 01, burner does not ignite, fan may start briefly then stop	Ignition Failure / Flame Not Detected	View Details
02	Vokera water heater shows code 02, burner shuts down shortly after ignition or fails to light, possible overheat indication	Primary Heat Exchanger Overheat / Safety Thermostat Trip	View Details
03	Vokera water heater displays code 03, fan runs but ignition does not occur or appliance locks out on air pressure fault	Air Pressure Switch / Flue Fan Fault	View Details
04	Vokera water heater shows code 04, no hot water, appliance does not attempt to ignite when tap is opened	Domestic Hot Water Flow Detection Failure	View Details
05	Vokera water heater displays code 05, unit shuts down or will not start, temperature reading appears abnormal	NTC Temperature Sensor Fault (Flow or Return)	View Details
06	Vokera water heater shows code 06, burner shuts down on high temperature, frequent cycling, possible kettling noises	Flow Temperature Too High / Poor Circulation	View Details
07	Vokera water heater displays code 07, appliance fails to start or locks out on fan-related error	Fan Speed / Fan Feedback Fault	View Details
08	Vokera water heater shows code 08, no ignition, gas valve not operating correctly	Gas Valve Control / Modulation Fault	View Details
09	Vokera water heater displays code 09, appliance locks out on flue or combustion safety fault	Flue System / Combustion Safety Fault	View Details
10	Vokera water heater shows code 10, no hot water or heating, control panel unresponsive or intermittent	PCB / Control Board Fault	View Details
11	Vokera water heater displays code 11, appliance fails to start after power interruption or software error	Internal Software / Configuration Fault	View Details
12	Vokera water heater shows code 12, no hot water, appliance detects low water pressure or flow in primary circuit	Low System Pressure / Water Pressure Switch Fault	View Details
13	Vokera water heater displays code 13, appliance shuts down on flue over-temperature or sensor fault	Flue Temperature Sensor Fault / Overheat	View Details
14	Vokera water heater shows code 14, appliance locks out on condensate or drainage-related fault	Condensate Drain Blockage / Siphon Fault	View Details
15	Vokera water heater displays code 15, appliance fails to detect flame correctly, intermittent hot water	Flame Detection / Ionisation Fault	View Details
16	Vokera water heater shows code 16, appliance shuts down on DHW temperature fault, water may be excessively hot or cold	DHW NTC Sensor Fault / DHW Overheat	View Details
17	Vokera water heater displays code 17, appliance indicates circulation or pump fault, may overheat quickly	Circulation Pump Fault / No Flow	View Details
18	Vokera water heater shows code 18, appliance indicates expansion or pressure-related fault	Expansion Vessel / Pressure Control Fault	View Details
19	Vokera water heater displays code 19, appliance indicates sensor short-circuit or wiring fault	Sensor Short-Circuit / Electrical Fault	View Details
20	Vokera water heater shows code 20, appliance indicates sensor open-circuit or disconnection	Sensor Open-Circuit / Disconnected	View Details
–	Water heater causes RCD or fuse to trip when it attempts to start	Electrical Short / Earth Leakage	View Details
–	Water heater does not power on at all, display is blank	No Power to Appliance	View Details
–	Water heater emits a burning smell or visible smoke from the casing	Electrical Overheating / Component Burnout	View Details
–	Water heater emits a strong metallic or burning dust smell when first used after a long period off	Dust Burn-Off / Light Overheating	View Details
–	Water heater ignites but shuts down after a few seconds, hot water stops quickly	Flame Loss After Ignition	View Details
–	Water heater is excessively noisy during operation (whining, grinding, or rattling)	Mechanical Noise from Fan or Pump	View Details
–	Water heater is leaking water from underneath the casing	Internal Water Leak	View Details
–	Water heater makes loud banging or kettling noises when producing hot water	Heat Exchanger Kettling / Localised Boiling	View Details
–	Water heater pressure gauge drops over time and needs frequent topping up	Chronic Pressure Loss	View Details
–	Water heater produces no hot water at any tap, display is on but burner does not fire when hot tap is opened	DHW Demand Not Recognised	View Details
–	Water heater provides hot water but temperature fluctuates between hot and cold during a shower	Inconsistent DHW Temperature Control	View Details
–	Water heater’s burner cycles on and off rapidly while a hot tap is open	Short Cycling on DHW	View Details
–	Water heater’s burner runs but hot water temperature is too low even at maximum setting	Insufficient DHW Output Temperature	View Details
–	Water heater’s fan runs continuously even when there is no demand for hot water	Fan Overrun / Control Fault	View Details
–	Water heater’s flue terminal drips large amounts of water or stains the wall	Condensate / Flue Drainage Issue	View Details
–	Water heater’s hot water flow rate is significantly reduced compared to cold water flow	Restricted DHW Flow	View Details
–	Water heater’s hot water is discoloured (brown or black) when first run	Corrosion / Debris in DHW Circuit	View Details

Vokera Water Heaters Error Codes

No matching codes found