Its a good idea to test the central oven temperature test on ovens to test the percentage variation on the heat control inside the oven. ovens regulate temperature by on off control of the heat element so exact temperature control is never going to be realistic but customers often need some level of accuracy for cooking with set temperature and time recipes.
Its first wise to be realistic with your expectation and aim for round 10% if you within 10% of the needed temperatures then you can assume the thermostat and element are function ok. So if you need 200 degrees the element turning off at 220 degrees C and back on at 180 degrees C would be about the best we could expect.
So set temperature meter up to take the oven temperature and watch the thermostat light go on and of 4 times while monitoring the temperature, if this is out by 10% of the selector temperature then the thermostat needs replacing.
see video of me doing this below
Door sealing is important to maintaining the ovens temperature as faulty seals will allow the expensively created heat to escape and allow cold air to enter into the cavity creating cold spots inside the cavity. So ensure you check the seal round the door and correct alignment of the door and hinges.
Buy cooker oven spares on Ebay UK here
Buy a good Multimeter on Ebay UK here
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