You are making supper, and three rings on your electric hob are heating up, but one stays cold. It is a very common problem in UK homes, and it usually means one part linked to that ring has failed. The other rings can still work normally.
This guide explains some simple, safe checks you can do first, the most common causes for a single dead ring and when to call a repair engineer.
If one ring on your electric hob is not working, first check that the hob is not locked, the control is set correctly, the pan suits the ring (for induction) and the cooker has not tripped. If those checks do not help, the cause is usually a faulty heating element, a worn control switch, a control board fault or a damaged connection. These need a qualified engineer.
Simple Checks to Try First
These checks cost nothing, and sometimes they fix the problem.
- Check the control lock: Many glass hobs have a child lock or control lock. Look for a lock symbol on the display, and check your manual to see how to turn it off.
- Check the fuse box: Hobs use a lot of power. If the cooker has tripped, the whole hob may go off. Look at the trip switches in your fuse box, and reset any that have switched off. If it trips again, do not keep resetting it, and call an engineer.
- Dry and clean the glass: On touch-control hobs, water, grease or spilt food on the control area can stop the buttons working. Dry the glass with a clean cloth and try again.
- Check your pan (induction hobs only): Induction rings only work with magnetic pans. Check that a small magnet sticks to the bottom of the pan. Also make sure the pan is not too small for the ring.
- Check the settings: Some hobs share power between zones, so one ring may reduce or switch off when others are on high. Check your manual.
- Do a power reset: Switch the cooker off at the cooker switch for five minutes, then switch it back on. This can clear a minor glitch on electronic hobs.
Why is One Ring on My Electric Hob Not Working?
If the simple checks do not help, there is probably a fault inside the hob. These are the five most common causes.
1. A Faulty Heating Element
The heating element makes the heat. On a solid plate hob, a coil sits inside the cast iron plate, and on a ceramic glass hob, a metal ribbon sits under the glass. Over time, heating and cooling can cause the element to break, so electricity can no longer flow and the ring stays cold. A broken ribbon element can sometimes be seen as a visible crack or burnt mark under the glass.
2. A Worn Control Switch
Hobs with dials use a control switch behind each knob. It opens and closes to regulate the heat. After years of use, the internal contacts wear out or stick, and power cannot reach the ring. You may turn the dial and nothing happens, or the ring may stay on high and not adjust.
3. A Control Board or Relay Fault
Hobs with touch controls use an electronic control board. It has small switches called relays that send power to each ring. If one relay fails, power cannot reach that ring, while the others keep working. The display may show an error code, so check your manual to see what it means.
4. Loose or Burnt Wiring
The inside of a hob gets very hot. Heat can loosen connections over time. A loose connection can cause arcing, which can burn the wire insulation. If the wiring to one ring is damaged, that ring will stop working. This is a safety risk, so stop using the hob and call an engineer.
5. A Faulty Thermal Limiter or Sensor
Ceramic hobs have a small thermal limiter that cuts the power if the ring gets too hot, to protect the glass. If it fails, it may stay open, so the ring will not heat even if the element is fine. In some hobs, other temperature sensors can cause the same problem.
Know Your Hob Type
- Solid plate hobs: Cast iron plates that heat and cool slowly. Common faults are a broken internal element or a worn control switch.
- Ceramic glass hobs: Heating elements sit under the glass. Common repairs include a burnt element or a faulty limiter. If the glass is cracked, switch the hob off at the cooker switch straight away and do not use it.
- Induction hobs: These heat the pan using a magnetic field. If one zone fails, it is often because of the wrong pan, a control fault or a failed board.
Not sure whether you have a hob, a cooker or an oven? Our guide on the difference between a cooker, hob and oven explains how each one works.
What is Safe to Do Yourself?
UK mains electricity is 230 V, and a hob uses a large amount of power. Always put safety first.
Safe to do:
- Reset a tripped switch once.
- Dry and clean the touch controls.
- Test your pan with a magnet.
- Reset the hob by switching it off at the cooker switch for five minutes.
Leave to an engineer:
- Lifting the hob out of the worktop.
- Testing internal parts with a multimeter.
- Replacing elements, switches, sensors or control boards.
- Repairing burnt wiring or a cracked glass top.
If you notice a burning smell, sparks, cracked glass or a tripping fuse, stop using the hob, switch it off at the cooker switch and call an engineer.
When Should You Call an Engineer?
Call an engineer if:
- The ring is still cold after the simple checks.
- The ring stays on high and does not turn down.
- The hob trips your fuse box.
- You smell burning or see marks on the glass.
- The glass top is cracked.
- An error code stays on the display.
A trained engineer will switch the power off safely, test the parts with a multimeter and fit the correct replacement.
Frequently Asked Questions
Can a single hob ring be repaired without replacing the whole hob?
Often, yes. An engineer can replace the failed part, such as an element, switch or board. Whether this makes sense depends on the age and type of your hob.
How much does it cost to repair a hob ring?
It depends on the hob, the part and the fault. A trained engineer can give you a clear price after diagnosing the problem.
Why does my induction ring turn on and then off quickly?
Common causes are a non-magnetic pan, a pan that is too small or too hot, a sensor detecting high heat or a control fault. Check your manual and try a suitable pan.
Is it safe to use the other rings if one ring is dead?
It can be, if the cause is a simple element fault. But if you smell burning, see sparks or the fuse keeps tripping, switch the hob off at the cooker switch and call an engineer.
Why does one ring on a ceramic hob not heat up?
It may be a broken element, a faulty limiter or a control fault. A glass top that is cracked or marked also needs checking straight away.
Need Help With a Hob Ring That Has Stopped Working?
A broken ring makes daily cooking hard. Our trained and insured engineers cover all London boroughs and work on all major brands, including Bosch, Neff, Siemens, AEG, Zanussi, Hotpoint, Beko and Rangemaster, with a guarantee on parts and labour.
If the simple checks have not solved the problem, book a visit for Hob Repair in London and get honest advice and clear pricing. Contact London Appliance Repair now.