what should i do if my cooktop control knob is cracked or slipping?
a cracked knob or damaged insert can turn without moving the control correctly. if the shaft is stiff or the burner will not turn off, a new knob is not the answer by itself.
keep the cooktop off and cold. inspect visible damage without pulling the knob off, levering against the panel, forcing the shaft or using pliers to operate it. use the model label, paperwork and any already-removed knob photograph for identification.
the linked guide concerns the 157240686 knob and insert, not a valve or switch. a repairer must confirm that the underlying control is sound and the marker agrees with its position. on BG4S, insert and marker orientation matter and defective-product repairs require an authorised service agent. if normal off operation cannot be confirmed, leave it off for service.
first checks
- inspect without operating the shaft
record cracks or missing pieces with the control cold and off; do not use a broken knob as a workaround.
solutions
diy warning
working on appliances can involve mains electricity, water and moving parts. always disconnect power and water before you start. in Australia, gas work must be done by a licensed gasfitter, and fixed (hard-wired) electrical work by a licensed electrician. everything on this site is guidance only, and any repair you carry out is at your own risk. we are not responsible for any damage or injury caused by attempting a repair. if you are not confident, please use a qualified technician.
