Why Your Cooker Takes Ages to Heat Up (And How to Fix It)
We understand how frustrating it is when your oven takes ages to heat up. Whether you’re hosting a party and timing dishes or just want dinner ready on time, you need an appliance you can rely on. At Cooker Solutions, we offer expert advice and reliable repair options for homes and businesses. We are here to tell you the reasons why they could be taking a while to heat up, and some tips on how to fix it or your next steps.
Common Reasons Your Oven Takes So Long to Heat Up
If your oven feels like it’s taking forever to reach temperature, there’s usually a clear reason behind it. Some issues are simple, others need one of our qualified engineers, but spotting the likely cause is the first step to getting it sorted.
Here are the main reasons as to why:
Worn or failing heating element
Over time, the element can weaken or partially fail. The oven might still warm up, just much more slowly, and struggle to reach higher temperatures.
Faulty thermostat or temperature sensor
If the thermostat is not reading the temperature correctly, the oven does not know how hard it needs to work. You might notice it never seems to get properly hot or swings between too hot and too cool.
Damaged or loose door seal
A worn, split or loose rubber seal lets heat escape. The oven has to work much harder to maintain temperature, so preheating takes longer and food cooks unevenly.
Fan problems in a fan oven
In fan assisted ovens, a broken or noisy fan means hot air is not circulating properly. This can cause hot and cold spots and makes preheating noticeably slower.
Overloaded shelves or blocked air flow
If the oven is packed full or trays are touching the sides, hot air cannot circulate. Even a healthy oven will take longer to heat and cook food if the air has nowhere to move.
Incorrect settings or preheat habits
Using a lower temperature than you think, the wrong function, or constantly opening the door to “check” can all drag the heat up time out more than you realise.
Old or poorly insulated appliance
Very old ovens or cheaper models with poor insulation lose more heat through the sides and door, so they naturally take longer to warm up and stay hot.
Simple Checks You Can Do Yourself
If you are somebody who likes the opportunity to try and perform a quick fix, then there are certainly some simple checks you can do and if you have looked into similar issues before you may be able to sort them on the spot, others are not so easy. Regardless, look into the following for peace of mind of how your oven currently is and what to take note of if you need one of our cooker services:
- Look for visible damage to the element
When the oven is completely cool and switched off at the wall, inspect the element. If you see blisters, cracks, sagging or obvious burn marks, it’s likely failing and will need replacing. - Check if all functions behave the same
Try preheating on a fan oven, then on conventional, then grill. If one function gets hot quickly but another takes ages or never reaches temperature, that points to a specific element or setting fault. - Use an oven thermometer (if you have one)
Place a separate oven thermometer inside, set the oven to a known temperature and time how long it takes to get there. If the display says 200°C but the thermometer is stuck at 150°C, the thermostat or sensor may be at fault. - Check the door is sealing properly
Close the door on a thin piece of paper in a few places around the frame. If you can pull the paper out easily with no resistance, the seal or door alignment may be letting heat escape. - Listen and feel for the fan
On a fan oven, you should hear a steady fan noise and feel even heat when you carefully open the door after preheating. If the fan is very noisy, grinding, or clearly not spinning, that will slow everything down. - Look for foil or trays blocking vents
Foil on the bottom of the oven, trays pushed right to the back or sides, or anything covering vents can block airflow and affect heating. Removing these can sometimes make a noticeable difference.
If you’ve tried these checks and your oven is still much slower than it used to be, it’s usually a sign of a failing part rather than user error.
Did You Know?
Most modern electric ovens draw around 2 – 3 kW of power when heating up. If yours has become so slow that it needs an extra 15 minutes of preheating every day, that adds up to roughly 200 kWh of wasted electricity a year. At typical UK rates, that’s around £50 in extra energy costs just to get the oven hot. To put it into context, 200 kWh is about the same electricity as 200 to 250 loads of washing in a modern washing machine.
So a “slow but still working” oven isn’t just annoying, it can quietly turn into one of the most expensive appliances on your energy bill.
Why Choose Cooker Solutions?
We pride ourselves as one of the leading cooker engineers in local areas such as Bromley, Clampham, Croydon, Battersea & Wimbledon, Brixton & Wandsworth and Dulwich. At Cooker Solutions, we specialise in electric oven, cooker and hob repairs. Our local engineers focus on these appliances every day, so faults are diagnosed and fixed quickly, with no call-out fee if we can’t repair the problem.
We’re open 9am–9pm, seven days a week, carry common parts for same-day fixes where possible and can also install new appliances when a replacement makes more sense. With plenty of genuine 5-star reviews from local customers, you can trust us to get your cooker working safely and efficiently again. Check out our online reviews today!
Contact Our Team Today!
If you are concerned about your cooker or simply just have some questions you would like to be answered, then we are more than happy to help. Contact us today for the best local advice and the chance to get your cookers fixed or upgraded with our professional team!