the oven takes up to 1 hour to flare up, enabling me to correctly set reg?
 
                i have just moved house and inherited a stoves cooker, after igniting the oven it can take 5 minutes or 1 hour to fully flare up enabling to set the correct reg,  can it be fixed. the mercury vapour valve i have been told needs repair or replacing??????
            
             yvonne
            
 June 2012