My conventional oven is 21yrs old. About 4 times now, the oven won't turn on. The oven light & griller work, but I haven't cooked long enough to test it. The bottom griller also works. The 2nd time my oven didn't work I thought it may have been the element as the oven was on for a few hours. Having left if for 2 days I turned it on and it worked. Then 4 days ago I was cooking a roast and the oven turned itself off after 1hr. The other day it worked. Yesterday, it worked, but I only cooked 45mins. Now,I can hear a crackling/static sound coming from the back of the griller section below. The clock of course stops as well when oven doesn't work. I can't afford a replacement oven, can you pls help?

the temp is about right and the time is 2 3/4 hours for medium rare
in your browser bar type in ---cooking times for 3lb chuck roast--and there are recipe pages for all cuts of beef , temperatures and times

A convection oven cooks food with heat; much like a conventional oven. It is faster, though, as it circulates the air around inside the cavity.

So, it's faster than a conventional oven, but slower than a microwave oven.

Conventional ovens which also microwaved at the same time, have also been manufactured.
They were also faster than a conventional oven, but slower than a microwave. But they were not the same as a convection oven as they did not circulate the air.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

Remember that some parts of a 240 volt stove require two live wires and most of the controls or elements being only 120 volts require just one live wire. Hence the double pole 40 amp breaker must have tripped but does not appear tripped. Just turn it off and back on to reset

The way the oven works is like so:
1) User sets the desired temperature
2) Power is sent to the ignitor
3) The ignitor is then energized, drawing 3.2 amps of current
4) When the 3.2 amps is drawn, the gas safety valve is allowed to open and gas flows into the burner assembly in the oven.
5) This gas is then ignited, causing the oven to heat.
6) As the oven heats up, the oven sensor, which is the metal rod located at the top on the rear oven wall, converts the heat into an electrical signal, relaying this information to the main control which in turns displaying the temperature.
(In models with a dial thermostat, there won't be a sensor, though a metal wire with a bulbous end will be present, which is actually connected to the thermostat.)

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

I have a Superba built-in YKEBS 177 D56 ( dual convection/convention)...I think it might be about 10 years old. I noticed the same thing starting last year..the temperature seems a litlle off and the cook time on the convention seems to take longer. I've never used the conventional oven so I don't know if the temperature is OK on that component.
I don't have a manual. and I've been searching for it...does anyone know which one I need?
Sorry I couldn't help with your problem, mine is similar to your though!!

You can print a new manual off of www.chargriller.com. But, the basics are:
1) Take cooking grates off of grill
2) Put enough charcoal on the grill to cover the desired cooking area two coal layers high
3) Pile up desired amount of charcoal (laid out in step 2)
4) Spray lighter fluid all over charcoal pile
5) Light the pile
6) Let the pile burn until the flames die out and most of the coal has turned white
7) Spread the coals back out (use tongs they will be hot). Put any coals that are still black on top of the white ones.
8) Put your cooking grates back on the grill and let the last black coals turn white and the grates heat up.
9) Now cook!

Set the oven thermostat to 100 degrees ( very low heat) and wait to see if the onen indicator goes off. If it doesn't then the oven thermostat may be faulty. If you have an oven thermometer, then use that to check the oven temperature.

HI SIR  
When you first use your Oven, the Oven will need to "settle". That is, it needs to burn off production residues and dust. The metal used in the Oven will also expand slightly when first used. You will experience some crackling and a strong smell. This is perfectly normal and we advice you anticipate this "settling" prior to use. Using an empty Oven, select Function 4 and set a temperature of 250°, allow the Oven to "settle" for hour, turn to function 3 and heat for a further 1/2 hour.
Multifunction Oven Function Selections

2. Defrost - This function activates the fan only, (no heat is used) to allow controlled and hygienic defrosting.
3. Conventional cooking - Normal or traditional cooking functions using the top and bottom elements. When using this function set the thermostat between 50 - 250°C. When the desired temperature is reached the yellow light will go out and then alternate between lit and unlit as the temperature is controlled.
4. Fan-Forced cooking - This selection is best for multilevel cooking as the heat generated by the central element is circulated around the Oven, creating an even heat environment. You will need to set the thermostat dial between 50-250°C for this function.
5. Center Griller - For best results set the thermostat to MAX. The door may remain closed or completely open.
6. Large Griller - For best results set the thermostat to MAX. The door may remain closed or completely open.
7. Fan Griller - This function combines the grill element with fan assistance and is used in conjunction with the thermostat. The Oven door must remain CLOSED during cooking. The thermostat dial should be set between 50-250°C for this function. 
8. Fan-assisted Baking or Patisserie Setting - Combines the concealed bottom element with fan assistance and is used in conjunction with the thermostat. The Oven door must remain CLOSED during cooking.

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Advanced Oven Features

Cavity Cooling
The Oven has an advanced cavity cooling system. A cylindrical fan is mounted on the rear outside frame of the Oven. This fan assists the movement of air through the Oven cavity keeping it cool. In addition to reducing the temperature in the Oven cavity, the air is blown out around the Oven door handle which keeps the door handle cool. The cooling fan is activated when the Oven light or any cooking function is selected and will switch off after all Oven functions have been turned off.

Triple Reflective Door Glazing
Some Ovens have two levels of removable door glass. The two inner layers are removable and are made of a reflective glass which, in effect, reflects heat back into the Oven and results in a significant reduction in the outside door surface temperature. To clean the door glass, use a coin or large screwdriver to remove the screws. Wipe both sides of the inner, middle and outer glass. Wipe the sealing gasket. Don't forget to replace the rubber sealing gasket around the centre glass layer before replacing the glass. Ensure the narrow air gap lies between the inner and centre glass layers and the wider gap lies between the centre and outside glass layers. Tighten each screw gradually, one then the other until firm. Do not overtighten.

Wipe Clean Enamel (Extra Optional)
Some models have easyclean blue enamel paint throughout the internal cavity walls. Other models have baking trays and grill pans finished in the soft grey super tough "wipe clean" enamel. This enamel is less porous than conventional, so that food does not adhere as easily. Simply wipe clean with a soapy cloth or creme cleanser when cooking is finished. For baked on residue, use a smooth scraper or if necessary a non-caustic Oven cleaner.

Drop Down Grill Element (Extra Optional)
The removal of a single screw at the front of the upper grill element in some models allows the element to drop down so that cleaning of the roof of the Oven is made easy. On completion of cleaning, simply replace the grill element and secure with the screw, finger-tight.

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The Electronic Timer



Normal Baking

Function 3: Normal Oven baking using heat from both the upper element and concealed lower element.

To bake, place the Oven rack in the appropriate position according to the type of food to be cooked. Turn the Function Selector to Position 3 and the thermostat knob to the correct temperature, and allow the Oven to fully preheat for best results.

Ideal for cooking casseroles, soufflés, roast, meats, and other items which require a slow method of cooking.

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Fan Forced Baking

Function 4: Fan-forced central element cooking requires slightly different timing techniques than normal cooking. The fan draws the air in and over the central element which is positioned around the fan and then circulates it back around the Oven cavity. The even distributor of heat allows foods to rise and cook simultaneously regardless of shelf level. Lower cooking temperatures and in some cases less cooking time is another advantage of this feature.

Turn the Function Selector to Position 4 and turn the thermostat to the desired temperature. Pre heating takes much less time than a normal bake Oven.

Note: When cooking meats, for best results always preheat the Oven to ensure the meat surface is sealed to lock-in juices for a moist and tender result.

Fan forced cooking is ideal for multilevel cooking e.g.. patty cakes. Another advantage of fan forced cooking is that different types of food may be cooked simultaneously without mixing the aromas or flavours. When using the Oven in this way, ensure that all the foods require the same cooking temperature and check the finish times of each dish for best results.

Please note that fan-forced cooking is faster than conventional methods, so take care not to burn your food when you first start using this method.

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Grilling

Function 5 & 6: During grilling the door may remain closed or completely open.

This function offers the traditional grilling method necessary to achieve proper browning without overcooking the interior of the foods.

Position 5 activates the centre section of the upper grill element only, which is ideal for browning smaller portions or thinner cuts of meat.

Position 6 activates the entire upper element for the grilling of large quantities or thick cuts of meat.

Allow the griller to pre-heat for approx. 2 minutes before sliding the tray into position.

Place the grill tray into the roasting pan and arrange food according to the function you have selected, either in the centre of the tray or spread across the full width of the tray. Position the tray at the correct grilling level and turn the thermostat control to MAX for best results.

As the temperature is set to MAX you may need to adjust your grilling shelf height to suit the desired cooking result. If the tray is too close to the element, the food will be exposed to the full effect of the element and may burn and create smoke.

replace the oven temp sensor. it looks like a probe that is in the oven, at the top