AGA H fault codewhat it means and how to fix it
AGA’s hob hot indicator. They publish that it shows for a short period after power off, and they pointedly do not publish how hot the glass actually is.
Before you start
What was the hob doing before the character appeared?
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.
What was the hob doing before the character appeared?
Ordinary residual heat, working as AGA describe it. Heat has moved out of the pan base into the surface and it needs time to leave again.
Leave the zone alone until the character goes out. There is nothing to fix.
What was the hob doing before the character appeared?
Published behaviour rather than a stuck display. AGA state the indicator shows for a short period after power off.
Wait. If it is still there long after the surface has gone cold, report it.
What was the hob doing before the character appeared?
More likely to be another state from the indicator grid than residual heat, and prolonged pad contact is the one owners meet without recognising it.
Clear everything off the touch panel and dry it with paper towel, then look again before treating it as a fault.
What H means
On the eR7i induction module the character shown in AGA’s figure is an H, and their explanation is short and mechanical. The hob surface gets hot when in use, they say, because heat is conducted from the cooking pan, and the surface also remains hot for a while after use, so the hob hot indicator will be displayed after the cooking period and for a short period of time after power off. That last clause answers a question owners ask constantly, which is why a display seems to stay alive on a hob they have just switched off: AGA intend it to, because the glass does not cool at the speed a switch operates.
What AGA do not give is a number. There is no temperature threshold anywhere in the eR7i guide, and no duration beyond the phrase a short period. Several other manufacturers in this category do publish figures, and it would be easy to lift one and present it as though it applied here. We are not going to, because a borrowed threshold is an invented fact, and the invented version of this particular fact is the kind that gets somebody burnt. Treat the AGA position as exactly what it says: the character means hot, AGA decline to say how hot, and the character going out is therefore not a promise that the surface is safe to lean on. Worth knowing too is what the H sits alongside. The eR7i display indicator panel is a grid of symbols covering auto cook, warming settings, pan detection, timer set, residual heat, pause set, boost, power levels, bridging, and one more that is genuinely unusual: prolonged pad contact. That is a named display state for something resting on the touch panel — a cloth, a lid, a chopping board, a hand leaning on the glass while you reach for something.
AGA confirm the indicator exists and publish neither what character it uses nor how long prolonged means, so if you see something you cannot place while nothing is cooking, clearing the panel is a sensible first move even though we cannot tell you which symbol to look for. And remember what the hob is bolted to. An AGA is a heat storage cooker, so the cast-iron top and the hotplate covers beside the induction zones hold heat far longer than any indicator on the glass is tracking, and nothing on the display says a word about them.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| A zone has just been used | AGA attribute the heat to conduction from the pan into the surface rather than to the hob warming the glass on purpose. | Common |
| The indicator outlasting switch-off | Published behaviour: it shows for a short period after power off, which owners read as a hob that will not turn itself off. | Common |
| Something resting on the touch panel | The indicator panel includes a prolonged pad contact state, which is a message about an object on the controls rather than about temperature. | Occasional |
| A symbol from the indicator grid read as a fault | Ten display states share that panel, including bridging, pause and the warming settings, and several are unfamiliar enough to be mistaken for a code. | Occasional |
| Heat from the cast-iron cooker rather than the zone | The hotplates and top plate beside the module store heat for a long time and no indicator on the glass reports on them at all. | Occasional |
What to try yourself
Keep off that zone while the character is showing. It is the only warning the hob gives you and AGA give no figure to argue with it about.
Do not try to time it. With no published temperature and no published duration, there is nothing to plan around except the indicator itself.
Expect it to persist briefly after you have switched the hob off. AGA publish that behaviour explicitly.
If a character appears while nothing is cooking, take everything off the control area — cloths, lids, boards — and see whether it clears.
Treat the cast-iron top and the hotplate covers as hot in their own right. No indicator on the induction glass is reporting on them.
If the character never clears, or shows on a cooker that has been off overnight, note it down and raise it with AGA Service.
Get a qualified appliance engineer to look at your AGA H
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
Time on site
5 minutes
Nothing. This is an indicator doing its job, and there is no repair attached to it unless the character refuses to clear on a cooker that has been off for hours.
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 AGA fault codes
- Hob will not go above a certain power levelUsually simple to fixNot a fault and no code: AGA’s overheat protection quietly reduces the power levels available, so the number simply refuses to go higher than the display shows.Related: same brand
- n 3.11Get it checkedAGA’s owner guides confirm error codes exist and publish one example of the format, n 3.11, with no meanings. The owner remedy for every code is to tell AGA Service.Related: same brand
- 011Get it checkedAGA’s eR7 service manual lists 010 to 014 as a full power time-out: a cooking zone took too long to reach temperature. AGA’s first action is customer education, then the thermocouple.Related: same brand
- E2 and E6Get it checkedThe only two AGA codes with a published cause. Both point at poor-quality or non-induction cookware, and AGA warn that carrying on may seriously damage the hob.Related: same brand
Own an AGA range cooker? Save it and its codes come first next time.
Related guides
Common questions about AGA H
How hot is the zone while the indicator is showing?
AGA do not say, and that is a genuine answer rather than an evasion on our part. Their wording is that the surface remains hot for a while after use, with no threshold attached. Other manufacturers publish temperatures for their own hobs and those figures belong to those hobs, not to this one.
How long does it stay on for?
Also unpublished. A short period is all AGA commit to, and how long that actually is depends on how hard the zone was worked. Because there is no figure and no timer, the practical rule is to believe the indicator rather than the clock.
What is prolonged pad contact?
A named display state on the eR7i indicator panel for something resting on the touch controls. AGA confirm the indicator exists but publish neither the character it uses nor how long prolonged means, so we can tell you the behaviour is real and not which symbol to expect.
The glass feels cool but the indicator is still showing. Is it faulty?
Probably not. The sensing is under the glass rather than on the surface you are touching, and the part of the zone directly under the pan base holds heat longest. A display that clears on a stone-cold cooker over many hours is normal; one that never clears at all is worth reporting.
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.