Advice Centre:
Why is my oven always on Low Flame and not heating up?
knobs.jpgIf your oven is always on Low Flame, this is normally an indication that the Flame Failure Device (FFD) is faulty. This part is also known as a Flame Supervision device, or Flame Safety device.

The typical symptom for a faulty Flame Failure Device (FFD) is that the oven will ignite but the flame will not rise to the full height as you would normally expect after 15-45 seconds. Therefore you will experience the oven not heating correctly or reaching the desired temperature.

The Flame Failure Device is designed to restrict the flow of gas to a safe level until it acknowledges the presence of the flame. This is achieved through heating a sensor that pierces the initial flame. As the sensor heats up, it expands a valve inside the Flame Failure Device, unrestricting the supply of gas. If the sensor, or capillary feeding the sensor, has become damaged, it can cause the Flame Failure Device to fail. This is a common fault and can be easily corrected by sourcing the appropriate spare.

We can supply most Flame Failure Devices (including Thermal Couples) for all British and Continental Gas Cookers, including Natural Gas and LPG, from stock. Please contact us with the make and model and we can order this for you.

We welcome you to email or call on +44 (0)1273 420134 if you need help in finding the correct item for your appliance. In order for us to help your enquiry we ask that you have the model and Serial Number of the appliance to hand when calling. We have guidance on our site to assist you in locating these numbers.

If you have a fault with your cooker, work should be carried out by suitability qualified engineer complying with your local laws. Within the UK, engineers performing work on gas carrying components need to be registered 'Gas Safe', you can look up Gas Safe engineers in your area on

We have a wealth of expertise on cookers (gas and electric) so do please contact us for advice. We are very experienced at helping customers of all levels of competence and will always endeavour to understand your needs and to use language you can understand.