Rangemaster EC fault codewhat it means and how to fix it
A supply voltage error. Reset it once, and if it comes back stop resetting — the hob is reporting something about the circuit feeding it.
Take care
What EC means
Rangemaster publish EC as a supply voltage error in the Eclipse 90 guide, with the action to switch off and on and continue to use the hob, escalating to a service agent if it returns. That two-stage instruction is the whole of the advice, and the second half matters more than the first. An induction hob monitors the supply it is running on because its electronics need voltage within a defined band to switch correctly. When it sees something outside that band it stops, and it stops before anything is damaged. So a single EC after a flicker in the supply, a brief cut, or a nearby appliance drawing heavily is a transient. The hob saw a momentary excursion, protected itself, and a reset is a perfectly reasonable response.
A recurring EC is different information. The hob is telling you consistently that the voltage at its terminals is not what it expects, and that is a statement about the circuit rather than about the appliance. The usual reasons sit in the installation: a connection that has worked loose at the cooker outlet or the appliance terminal block, a cable undersized for the load over a long run, or a shared circuit where something else pulls the voltage down when it starts. Loose connections are the most common of these and they matter beyond the error code, because a loose terminal carrying a cooker's current gets hot. There are two related codes in the same table worth distinguishing. E3 on the Eclipse 90 is the supply voltage being other than the rated values, and E4 is the supply frequency differing from the rated value; both have a longer published sequence than EC: switch off, wait until the H residual heat indicator has cleared from all zones, switch back on and continue.
For E4 Rangemaster add a further step if it comes back — switch the appliance off and on at its supply (their wording is the plug for the appliance; on a hob wired to a cooker circuit that means the cooker switch or isolator) — before calling a service agent. That waiting-for-H step is unusual and specific to them, and it is there so the control fully powers down rather than restarting from a warm state. On the RMB60HPEIGL platform the equivalent codes are E5 for mains voltage too low or too high and E6 for the mains frequency outside the permissible range.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| A transient dip or spike on the supply | The benign case and the reason a single reset is sanctioned. A brief excursion during a cut or a heavy load elsewhere in the house. | Common |
| A loose connection at the outlet or terminal block | The commonest cause of a recurring one. It matters beyond the code, because a loose terminal carrying cooker current heats up. | Common |
| Undersized or over-long supply cable | Produces voltage drop under load, so the code appears when the hob is working hardest rather than at random. | Occasional |
| A shared or overloaded circuit | Another appliance starting pulls the voltage down momentarily. Worth noticing whether the code coincides with something else switching on. | Occasional |
| A genuine supply problem | Less likely, and it would normally affect other things in the house. Worth mentioning to an electrician rather than assuming. | Rare |
What to try yourself
Switch the hob off and on once. Rangemaster sanction exactly this and expect a transient to clear.
If the code is E3 or E4 rather than EC, follow their longer sequence: switch off, wait for the H indicator to clear from every zone, then switch back on. For a returning E4, switch the hob off and on at the cooker switch as well before ringing anyone.
Note whether the code coincides with anything else in the house starting up — a shower, a kettle, a washing machine heating.
Note whether it appears under heavy load rather than at random, which points at voltage drop on the cable rather than at the supply.
If it recurs, stop resetting it and call an electrician rather than an appliance engineer. The hob is reporting on its circuit.
Mention loose connections specifically when you call.
Do not open the cooker outlet or the appliance terminal block yourself. It is a high-current connection on a hardwired circuit, and a loose terminal there is a fire risk rather than an inconvenience.
Get a qualified appliance engineer to look at your Rangemaster EC
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£250
Time on site
35 minutes
Nothing for a transient that resets and stays away. An electrician’s visit to find and remake a loose connection, and more if the circuit itself needs work.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related Rangemaster fault codes
- E5Get it checkedRangemaster publish two meanings for E5 in two different guides — an over-temperature in one, a mains voltage error in the other. Check which guide covers your model.Related: same brand
- E3Get it checkedTwo tables, two meanings. On the Eclipse 90 it is the supply voltage outside the rated values; on the RMB60HPEIGL it is a pan problem, and Rangemaster publish the test that separates pan from hob.Related: same brand
- E1Get it checkedThe cooling fan is disabled. Rangemaster offer no reset for this one — the published action is to call a service agent.Related: same brand
- EAGet it checkedAnother code Rangemaster publish two ways — a coil saturation error you can reset in one guide, a hardware fault in the other.Related: same brand
- C1Usually simple to fixOne of the C1 to C8 microprocessor alerts. Rangemaster’s published remedy is to switch off and on and carry on using the hob.Related: same brand
Own a Rangemaster hob? Save it and its codes come first next time.
Related guides
Common questions about Rangemaster EC
It cleared after one reset. Should I worry?
Probably not. That is exactly the behaviour Rangemaster expect when they sanction a single switch-off-and-on, and a momentary dip during a supply flicker or a heavy load elsewhere will do it. Note the date. If it becomes a pattern rather than a one-off, the answer changes.
Why an electrician rather than a hob engineer?
Because a recurring voltage error is the hob reporting accurately on the circuit feeding it. The appliance is doing its job by refusing to run outside its band. The likely faults — a loose terminal, an undersized cable, an overloaded circuit — all sit in the installation rather than in the hob.
What is the H I have to wait for?
The residual heat indicator. Rangemaster publish that H shows while a zone is above 60°C and goes out below it. Their frequency-error sequence has you wait for it to clear from every zone before switching back on, so the control fully powers down rather than restarting warm.
Could this damage the hob?
The code exists to prevent that, so the hob stopping is the protection working. The risk is in overriding it — resetting repeatedly to keep cooking means running the electronics on a supply they have already flagged. And if a loose connection is behind it, the hot terminal is the more serious problem.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.