What can I do about the hobs overheating - when on, they are only on the highest heat and can't be turned down.

Unfortunately, Induction hobs on domestic cookers have always been a problem. A single, one ring catering hob is $1,200 and is expected to last 2 years in an industrial environment.

There are two videos here, but I reckon you will need a service call.

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk01r2k0Xw_ZCF69PXpLMkc_N2QzdIQ%3A1608069741109&ei=bTLZX5KRBtfRtQb9wp6IBQ&q=belling+induction+hob+e5+error+code

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Go to the circuit breaker location on your house and locate the one for the oven. Try flipping it on and off a couple of times. If the breaker only supplies 120 volts the heating elements won't work but the light and clock will. If resetting the circuit breaker fixes the problem, it will happen again, so replace the breaker to do a permanent fix.

Hi

I have this problem as well. Did you get a solution?

Have same problem, I am repairing our 648HM double oven. Top oven overheats. I am an electronics engineer. I found that top oven fan has failed, this is the first thing to replace. The grill element also failed which maybe due to the overheating oven. NIGEL

The noise is probably cominbg from the externally mounted cooling fan. to access it, you will have to remove the side panel and rear cover, and top cover if it is bullt in.
If it is free standing, you should be able to get to it by removing the top cover/hob.
Hope this helps.

Adjust flame down, too high. Turn adjusting screw at control knob.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

If three of the rings are not responding to adjustment, then I would say yes, you have faulty regulators;It is a fairly straightfoirward job to replace if you know how to access the controls

It would appear that you have faulty temperature regulators, which you will have to replace, for three to go together is unusual, have you spilt something on the top, because liquid could have got inside the control panel.
Please leave feedback.
Thanks.

Your heater is probably equipped with a bimetal thermal switch to prevent overheating and, if it is like most made in China now, it is defective or at least highly inaccurate. If you can locate the device, using a metal shield to divert some of the heat will help it serve its original function as a safety. Look for a thick (4-5 mm), button-like device with two terminals and a diameter of 1.5-2.0 cm.  

This point of failure is shared with a majority of drip coffee makers that fail way too early.