Timer is making ticking noise cant turn it off.

Timers for oven are very special as they are switching a heavy amperage load.

Yours just needs replacing if the clock stops turning the dial. The last about 3 years of constant daily use.

'make and model' helps in questions like this and should be the first 3 words in every question as part of 'make model (what it is)'.

Hi, I know its been over a year but if we had the same problem, it was solved by twisting the timer knob located on the bottom left hand corner. This changes the symbols in the red patch. For me, the red patch showed the number 0 and once that was changed to a hand symbol or no bell symbol, the noise stopped

Sounds like an improperly grounded element in the circuit... If an element or wire makes contact with the metal frame and welds itself in place, the electrical current can BYPASS the control and heat uncontrolled- throw the circuit breaker to interrupt the power.
A thorough inspection must be made of the elements and wiring.
Help Me Find My Model Number

if all elements are not warm then there is no quantity of power being used
have an electrician check out the stove as it may be a faulty minute clock
check around the room for a clock that is keeping the time as that is a ticking noise even though it is battery operated.

Without a model number its hard to be exact. If your oven is older it will have a clock timer motor that turns the dials or flips the clock display cards. This timer has gears and bushings that will be annoying as they wear and start a vibrating hum or clicking-usually not worth tinkering with..it can be taken out and checked or replaced. Electronic timers of course don't have any moving parts to the timer, but have relays in the circuit to turn the oven on and off. They do not 'whir'. This is the likely issue.
Repost..let us know.

Ive heard of this before. Many oven Manufacturers use clockwork timers which give 1 faint "ting" noise when finished. Others use electronic ones, which are not much better. If you are not standing next to the oven, you cant hear it. I usually recommend a separate timer , like a water timer or egg timer type thing which you can set (and Hear) and leave it near where you are working so you can go and turn the oven off. These can normally be purchased at Smiths, Tandys etc maybe Big W or K Mart

Hey guys, I am having the same issues. My oven isn't turned on (not hot) nd it feels more like the timer/ clocvk are ticking?

Please help! The oven works perfectly just annoying having the noise constantly

What make and model is "the older model"?

If you can get at the fan blades without taking anything apart, try to turn the fan blade by using a small screwdriver or even a small wooden skewer. Listen to see if the blades are making contact with either fan cover or the back of the oven or the edges of the convection opening.

Once you determine which blade(s) are making contact, use a sharpie marker to mark those blades you need to correct. That way if the blades are hitting the fan cover, you'll know which ones need to be bent back into shape once the cover is removed.

With the oven turned off, you should be able to remove the circulating fan cover and correctly bend the fan blades back into shape and stop the noise.

Hope you found this very helpful and best regards!

It looks like an S551X-5, I think the timer is a safety mechanism, maybe just set it to full when in use and turn it off when you finish.
Go to http://www.smeguk.com/KitchenStudioLine/Product/S551X-5.aspx to see features, etc.