The knobs on my gas hob won't turn/appear to be seized up?

3 out of the 4 rings on my Belling Gas Hob have stopped working. the Knob used to turn them on have stuck and won't turn? What do i need to do?
Steven Ridyard, April 2007


done
i have a belling model 152, and only one of the knobs wont turn ,took the knob off and wd40 under the knob, but still not turning, ant suggestions please

thanks Ann

ann, May 2016
The gas taps will probably need greasing

gas man, May 2007
link Click here to see other fixes for Belling.