Belling ER400 fault codewhat it means and how to fix it
A 2022-generation Glen Dimplex code with only its remedy printed: check the mains cable connection and that the terminals at the terminal block are wired correctly.
Take care
Get a qualified appliance engineer to look at your Belling ER400
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.
Which table does your manual carry?
The right answer depends on what you can see. Pick the one that matches.
Choose the option on the left that matches what your appliance is doing, and the answer for that case appears here.
Which table does your manual carry?
You have the 2022-generation table and ER400 is genuinely part of your code set. Only the Solution cell is printed, and it is about the connection rather than the appliance.
Isolate at the wall and have the mains cable connection and terminal block wiring verified.
Which table does your manual carry?
ER400 is not in the 2025-generation set at all. The nearest published equivalent for a supply problem is E3 or E4, whose remedy is to contact your local electricity board.
Read the E3 or E4 page instead, and check the code characters again.
Which table does your manual carry?
Then the published remedy describes your situation directly. A 400-family code on a newly connected appliance is an installation question, and across the industry these codes consistently mean the appliance is miswired rather than faulty.
Have the installer return and check the connection before anyone is called out to the cooker itself.
What ER400 means
ER400 comes from the older of Glen Dimplex’s two induction code tables, the one headed “TROUBLESHOOTING WITH THE INDUCTION HOB” in the 2022-generation induction manual for the 100 to 110cm models. It is not in the 2025-generation Belling table, so if your documentation lists ER03, E1 or E2, E3 or E4 and LO, this code is not part of your set; if it lists E6 and E8 as well as ER400, it is. The provenance is worth stating plainly rather than glossing: the document carrying this table is badged Stoves — the Richmond, Precision and Sterling Deluxe induction manual, part 084006000 version 03, published October 2022 — and it covers the Glen Dimplex induction platform of that generation shared with Belling’s induction range cookers.
What Belling published under their own badge in 2022 we have not verified, and we are not going to imply that we have. Now the honest part about the code itself. In that table, ER400 has four columns and only two of them contain anything. The Problem cell and the Possible Cause cell are blank on the printed page — we rendered page 18 of the manual and looked, rather than trusting the text layer — so Glen Dimplex published no meaning for ER400, and none is attributed to it here. The Solution cell is quoted exactly: “Check mains cable connection and terminals at the terminal block are wired correctly.” That single line still tells you a great deal, because of what it does not mention. There is no component to replace, no board, no coil and no sensor. The entire published remedy is about how the appliance is connected to the electricity supply. That makes ER400 Glen Dimplex’s version of the 400-family code that turns up across the industry as U400 on other manufacturers’ hobs and range cookers, always meaning much the same thing: the appliance is wired incorrectly rather than broken. Glen Dimplex simply say it in plainer language than most.
The practical consequence is that this is not a code to attack with resets, and it is not a code to open the back of the cooker for. A range cooker of this size is hardwired through a cooker connection unit, and checking a terminal block means working on a live-capable connection inside the appliance. Switch the cooker off at the wall and get the connection verified by whoever made it, or by an electrician. If the cooker was recently installed, moved, or had its supply altered, that is where the answer will be.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| The mains cable is not correctly connected | The first half of the only cell that survives in the source table. Glen Dimplex point at the cable connection itself before anything inside the appliance. | Common |
| Terminals at the terminal block wired incorrectly | The second half of the published remedy. On a range cooker the terminal block arrangement depends on the supply, and getting it wrong is a wiring error rather than a failure. | Common |
| A recent installation, move or supply alteration | Not a cause Glen Dimplex name, but the circumstance in which a connection error exists at all. A code that appears the first time a newly fitted cooker is used points here. | Occasional |
| A loose or degraded connection at the terminal block | Distinct from being wired to the wrong pattern. A joint that has worked loose behaves like a connection error without anyone having wired it wrongly. | Occasional |
Can you fix it yourself?
Stop — this needs an engineer
What it costs to fix
Typical repair cost
£0
Time on site
45 minutes
Glen Dimplex publish no cost for this. The remedy is a check of the connection rather than a repair, and where a cooker was connected incorrectly during installation, that is a matter for whoever made the connection rather than an appliance fault. Neither Belling nor Glen Dimplex publish a figure for a connection check, so none is quoted.
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 Belling fault codes
- E3 or E4Get it checkedBelling send you outside the manufacturer for this one: the supply voltage may be too high or too low. Switch the cooker off at the wall and contact your electricity board.Related: supply and connection
- E1 or E2Get it checkedOne published row, one meaning. Belling give E1 and E2 together as the over-heat indicator: remove the pans and let the hob cool for about 30 minutes before using it again.Related: same brand
- ER03Usually simple to fixBelling list ER03 as an information code rather than a fault: something is covering the touch control area. Remove it, clean the glass, and the hob works normally again.Related: same brand
- LOUsually simple to fixLO is the hob child lock, released by holding the padlock key for a few seconds, and it is not the padlock on the oven timer. Two locks on one cooker, cleared two ways.Related: same brand
- Hob turns itself off after a long timeUsually simple to fixNot a fault. Belling publish a maximum operating time for every power level as a safety feature, from six hours at level one to ninety minutes at level nine.Related: same brand
- ER21Get it checkedThe 2022-generation table gives ER21 as the control unit cutting off after program setting, cause electronics overheating, remedy allow the appliance to cool. No service call published.Related: same brand
Own a Belling range cooker? Save it and its codes come first next time.
Related guides
Common questions about Belling ER400
What does ER400 mean?
We are not going to tell you, because Glen Dimplex did not publish it. In the source table the Problem and Possible Cause cells for ER400 are blank on the printed page, so no meaning is attributed here. What is published is the remedy: check the mains cable connection and that the terminals at the terminal block are wired correctly.
Is ER400 the same as U400 on other makes?
The 400-family code appears across several manufacturers as an incorrect-connection code, and Glen Dimplex’s published remedy points at exactly the same place — the mains cable and the terminal block. That is a consistent picture, but it is a comparison rather than something Glen Dimplex have stated, and we have not used it to invent a meaning for their row.
Can I check the terminal block myself?
No. A 100cm or 110cm range cooker of this type is hardwired through a cooker connection unit, and the terminal block sits behind a panel on a live-capable connection. Switch off at the wall and have it verified by whoever wired it or by a qualified electrician.
My manual does not list ER400. Why not?
Because Glen Dimplex publish two incompatible induction code tables. ER400 belongs to the 2022 generation, alongside ER21, E6 and E8. The 2025-generation Belling table drops all of those and adds E3 or E4 and LO instead.
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.